**Mercedes-Benz Check Engine Codes: Your Ultimate Guide**

Mercedes-benz Check Engine Codes can be a daunting issue for car owners, but understanding them is crucial for maintaining your vehicle’s health. At CARDIAGTECH.NET, we provide you with a comprehensive guide to decoding these error messages, helping you identify potential problems and find the right solutions. This guide ensures you can address issues promptly, keeping your Mercedes-Benz running smoothly and efficiently.

1. Understanding Mercedes-Benz Fault Codes

A Mercedes-Benz fault code, also known as a Diagnostic Trouble Code (DTC), is a standardized system code that indicates a malfunction within your vehicle’s systems. These codes are generated by the car’s onboard computer when it detects an issue, triggering a warning light on your dashboard.

1.1. What Triggers a Fault Code?

Fault codes are triggered by a variety of issues, ranging from minor problems like a loose gas cap to more significant mechanical or electrical failures. The onboard computer monitors numerous sensors and systems, and any deviation from the expected parameters can result in a fault code.

1.2. How to Access Fault Codes

Accessing fault codes typically requires a diagnostic scanner that can connect to your vehicle’s OBD-II port. This port is usually located under the dashboard. Once connected, the scanner can read and display any stored fault codes, providing valuable information about the nature of the problem.

1.3. Interpreting Fault Codes

Mercedes-Benz fault codes consist of a five-character alphanumeric code. The first character indicates the system involved (e.g., P for powertrain, B for body, C for chassis, and U for network). The following characters provide more specific information about the nature and location of the fault. For example, P0400 might indicate a problem with the exhaust gas recirculation system.

1.4. Importance of Addressing Fault Codes Promptly

Ignoring fault codes can lead to more severe damage and costly repairs. Addressing these issues promptly helps maintain your vehicle’s performance, safety, and longevity. Regular diagnostics and timely repairs are essential for keeping your Mercedes-Benz in optimal condition.

2. Common Mercedes Error Messages Explained

Understanding common Mercedes error messages can help you quickly identify and address potential issues. Here are some frequent fault codes and their typical causes.

2.1. P261F71: Circulation Pump Malfunction

This fault code indicates a malfunction in the circulation pump, often seen in Mercedes Sprinter vans.

2.1.1. Known Problem Of

Mercedes Sprinter Vans.

2.1.2. Likely Causes

Coolant intrusion into the vacuum system via the water pump.

2.1.3. What’s Happening?

In model OM651 4 Cylinder Diesel Engine, the coolant water pump is vacuum actuated. The internal seal in the water pump gives way and allows coolant (antifreeze) to enter the vacuum system. The vacuum system operates with the engine running. As the vehicle is driven, the vacuum is so powerful it pulls coolant (antifreeze) deeper into the vacuum system causing havoc on the entire vacuum system.

2.1.4. Possible Symptoms You May Experience

Check Engine Light
Little to no acceleration
Coolant leak
Brake Pedal Pressure
Engine overheating

2.1.5. Parts That Could Need Replacement

Water Pump
Coolant
Seals
Tubes
Hoses
Vacuum Actuators
Vacuum Pump

2.1.6. System(s) Affected

Engine
Cooling System
Vacuum System
Turbocharging
Brake System

2.1.7. Severity

Can be very severe if left unfixed. Repair requires MASTER LEVEL Technician and not something for the DIYer.

2.2. P126A00: OM642 Engine Oil Cooler Leak

This fault code indicates a leak in the engine oil cooler.

2.2.1. Known Problem Of

Mercedes Sprinter Vans.

2.2.2. Likely Causes

Failure of component: intake manifolds, or the intake manifold actuator motor.

2.2.3. What’s Happening?

Over time (several thousand miles) 50-100k miles the inside of the intake manifolds get clogged with EGR soot, buildup causing the intake swirl flaps to stick. The sticking or binding of these flaps then binds the motor which causes the check engine light and or a sever loss of acceleration.

2.2.4. Possible Symptoms You May Experience

Symptoms may include reduced engine performance and a visible oil leak.

2.2.5. Parts That Could Need Replacement

Intake Manifolds
Intake Manifold Actuator Motor

2.2.6. System(s) Affected

Engine

2.2.7. Severity

Can be very severe if left unfixed. Repair requires MASTER LEVEL Technician and not something for the DIYer.

2.3. Fault Code P0400 Series

The P0400 series of fault codes typically relates to issues within the Exhaust Gas Recirculation (EGR) system. The EGR system is crucial for reducing nitrogen oxide (NOx) emissions by recirculating a portion of the exhaust gas back into the engine’s intake. Malfunctions in this system can lead to reduced fuel efficiency, poor engine performance, and increased emissions.

2.3.1. P0466 – Purge Flow Sensor Circuit Range/Performance

This code indicates that the purge flow sensor circuit is not performing as expected. The sensor measures the flow of fuel vapor being purged from the EVAP system. Potential causes include a faulty sensor, vacuum leaks, or issues with the EVAP system.

2.3.2. P0467 – Purge Flow Sensor Circuit Low Input

This code suggests that the signal from the purge flow sensor circuit is lower than expected. This could be due to a faulty sensor, wiring issues, or a blockage in the purge flow.

2.3.3. P0468 – Purge Flow Sensor Circuit High Input

This code indicates that the signal from the purge flow sensor circuit is higher than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the EVAP control system.

2.3.4. P0469 – Purge Flow Sensor Circuit Intermittent

This code suggests that the signal from the purge flow sensor circuit is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent vacuum leaks.

2.3.5. P0470 – Exhaust Pressure Sensor Malfunction

This code indicates a malfunction in the exhaust pressure sensor circuit. This sensor monitors the pressure of the exhaust gas. Potential causes include a faulty sensor, wiring issues, or problems with the exhaust system.

2.3.6. P0471 – Exhaust Pressure Sensor Range/Performance

This code suggests that the exhaust pressure sensor is not performing within the expected range. This could be due to a faulty sensor, a clogged exhaust system, or issues with the engine’s performance.

2.3.7. P0472 – Exhaust Pressure Sensor Low

This code indicates that the signal from the exhaust pressure sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a leak in the exhaust system.

2.3.8. P0473 – Exhaust Pressure Sensor High

This code suggests that the signal from the exhaust pressure sensor is higher than expected. This could be due to a faulty sensor, a blockage in the exhaust system, or issues with the engine’s control system.

2.3.9. P0474 – Exhaust Pressure Sensor Intermittent

This code indicates that the signal from the exhaust pressure sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the exhaust system.

2.3.10. P0475 – Exhaust Pressure Control Valve Malfunction

This code suggests a malfunction in the exhaust pressure control valve circuit. This valve controls the flow of exhaust gas. Potential causes include a faulty valve, wiring issues, or problems with the engine’s control system.

2.3.11. P0476 – Exhaust Pressure Control Valve Range/Performance

This code indicates that the exhaust pressure control valve is not performing within the expected range. This could be due to a faulty valve, a clogged exhaust system, or issues with the engine’s performance.

2.3.12. P0477 – Exhaust Pressure Control Valve Low

This code suggests that the signal from the exhaust pressure control valve is lower than expected. Possible causes include a faulty valve, wiring issues, or a leak in the exhaust system.

2.3.13. P0478 – Exhaust Pressure Control Valve High

This code indicates that the signal from the exhaust pressure control valve is higher than expected. This could be due to a faulty valve, a blockage in the exhaust system, or issues with the engine’s control system.

2.3.14. P0479 – Exhaust Pressure Control Valve Intermittent

This code suggests that the signal from the exhaust pressure control valve is unstable or intermittent. This could be due to loose wiring, a failing valve, or intermittent problems with the exhaust system.

2.3.15. P0480 – Cooling Fan 1 Control Circuit Malfunction

This code indicates a malfunction in the control circuit for cooling fan 1. The cooling fan is essential for maintaining the engine’s temperature. Potential causes include a faulty fan, wiring issues, or problems with the engine’s control system.

2.3.16. P0481 – Cooling Fan 2 Control Circuit Malfunction

This code suggests a malfunction in the control circuit for cooling fan 2. The cooling fan is essential for maintaining the engine’s temperature. Potential causes include a faulty fan, wiring issues, or problems with the engine’s control system.

2.3.17. P0482 – Cooling Fan 3 Control Circuit Malfunction

This code indicates a malfunction in the control circuit for cooling fan 3. The cooling fan is essential for maintaining the engine’s temperature. Potential causes include a faulty fan, wiring issues, or problems with the engine’s control system.

2.3.18. P0483 – Cooling Fan Rationality Check Malfunction

This code suggests a rationality check malfunction in the cooling fan system. This means that the engine’s computer has detected an issue with how the cooling fan is operating, indicating a potential problem with the fan’s performance or control system.

2.3.19. P0484 – Cooling Fan Circuit Over Current

This code indicates that the cooling fan circuit is drawing too much current. This could be due to a faulty fan, wiring issues, or a problem with the engine’s control system.

2.3.20. P0485 – Cooling Fan Power/Ground Circuit Malfunction

This code suggests a malfunction in the power or ground circuit of the cooling fan. This means that there is an issue with the electrical supply to the cooling fan, potentially affecting its performance.

2.4. Fault Code P0500 Series

The P0500 series of fault codes typically relates to vehicle speed and idle control systems. These systems are crucial for maintaining proper engine operation and ensuring smooth vehicle performance. Malfunctions in these systems can lead to issues such as stalling, erratic idling, and reduced fuel efficiency.

2.4.1. P0500 – Vehicle Speed Sensor Malfunction

This code indicates a malfunction in the vehicle speed sensor (VSS) circuit. The VSS measures the speed of the vehicle and sends this information to the engine control unit (ECU). Potential causes include a faulty sensor, wiring issues, or problems with the ECU.

2.4.2. P0501 – Vehicle Speed Sensor Range/Performance

This code suggests that the vehicle speed sensor is not performing within the expected range. This could be due to a faulty sensor, a misaligned sensor, or issues with the ECU.

2.4.3. P0502 – Vehicle Speed Sensor Low Input

This code indicates that the signal from the vehicle speed sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the sensor’s connection.

2.4.4. P0503 – Vehicle Speed Sensor Intermittent/Erratic/High

This code suggests that the signal from the vehicle speed sensor is unstable, erratic, or higher than expected. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.4.5. P0505 – Idle Control System Malfunction

This code indicates a malfunction in the idle control system. The idle control system maintains the engine’s idle speed. Potential causes include a faulty idle air control valve, vacuum leaks, or problems with the ECU.

2.4.6. P0506 – Idle Control System RPM Lower Than Expected

This code suggests that the engine’s idle speed is lower than expected. This could be due to a faulty idle air control valve, vacuum leaks, or issues with the ECU’s programming.

2.4.7. P0507 – Idle Control System RPM Higher Than Expected

This code indicates that the engine’s idle speed is higher than expected. Possible causes include a faulty idle air control valve, vacuum leaks, or problems with the ECU’s programming.

2.4.8. P0510 – Closed Throttle Position Switch Malfunction

This code suggests a malfunction in the closed throttle position switch circuit. This switch detects when the throttle is closed. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.9. P0520 – Engine Oil Pressure Sensor/Switch Circuit Malfunction

This code indicates a malfunction in the engine oil pressure sensor or switch circuit. This sensor or switch monitors the engine’s oil pressure. Potential causes include a faulty sensor or switch, wiring issues, or problems with the engine’s oil pressure.

2.4.10. P0521 – Engine Oil Pressure Sensor/Switch Circuit Range/Performance

This code suggests that the engine oil pressure sensor or switch is not performing within the expected range. This could be due to a faulty sensor or switch, wiring issues, or problems with the engine’s oil pressure.

2.4.11. P0522 – Engine Oil Pressure Sensor/Switch Circuit Low Voltage

This code indicates that the voltage in the engine oil pressure sensor or switch circuit is lower than expected. Possible causes include a faulty sensor or switch, wiring issues, or a problem with the engine’s oil pressure.

2.4.12. P0523 – Engine Oil Pressure Sensor/Switch Circuit High Voltage

This code suggests that the voltage in the engine oil pressure sensor or switch circuit is higher than expected. This could be due to a faulty sensor or switch, wiring issues, or problems with the engine’s control system.

2.4.13. P0530 – A/C Refrigerant Pressure Sensor Circuit Malfunction

This code indicates a malfunction in the A/C refrigerant pressure sensor circuit. This sensor monitors the pressure of the refrigerant in the air conditioning system. Potential causes include a faulty sensor, wiring issues, or problems with the A/C system.

2.4.14. P0531 – A/C Refrigerant Pressure Sensor Circuit Range/Performance

This code suggests that the A/C refrigerant pressure sensor is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the A/C system.

2.4.15. P0532 – A/C Refrigerant Pressure Sensor Circuit Low Input

This code indicates that the signal from the A/C refrigerant pressure sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the A/C system.

2.4.16. P0533 – A/C Refrigerant Pressure Sensor Circuit High Input

This code suggests that the signal from the A/C refrigerant pressure sensor is higher than expected. This could be due to a faulty sensor, wiring issues, or problems with the A/C system.

2.4.17. P0534 – Air Conditioner Refrigerant Charge Loss

This code indicates that there is a loss of refrigerant charge in the air conditioning system. This could be due to a leak in the system, a faulty compressor, or other A/C system issues.

2.4.18. P0550 – Power Steering Pressure Sensor Circuit Malfunction

This code indicates a malfunction in the power steering pressure sensor circuit. This sensor monitors the pressure in the power steering system. Potential causes include a faulty sensor, wiring issues, or problems with the power steering system.

2.4.19. P0551 – Power Steering Pressure Sensor Circuit Range/Performance

This code suggests that the power steering pressure sensor is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the power steering system.

2.4.20. P0552 – Power Steering Pressure Sensor Circuit Low Input

This code indicates that the signal from the power steering pressure sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the power steering system.

2.4.21. P0553 – Power Steering Pressure Sensor Circuit High Input

This code suggests that the signal from the power steering pressure sensor is higher than expected. This could be due to a faulty sensor, wiring issues, or problems with the power steering system.

2.4.22. P0554 – Power Steering Pressure Sensor Circuit Intermittent

This code indicates that the signal from the power steering pressure sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the power steering system.

2.4.23. P0560 – System Voltage Malfunction

This code suggests a malfunction in the system voltage. This means that the vehicle’s electrical system is experiencing issues with voltage levels, which can affect various components and systems.

2.4.24. P0561 – System Voltage Unstable

This code indicates that the system voltage is unstable. This could be due to a faulty alternator, a failing battery, or wiring issues.

2.4.25. P0562 – System Voltage Low

This code suggests that the system voltage is lower than expected. This could be due to a faulty alternator, a failing battery, or excessive electrical load.

2.4.26. P0563 – System Voltage High

This code indicates that the system voltage is higher than expected. Possible causes include a faulty voltage regulator, wiring issues, or problems with the alternator.

2.4.27. P0565 – Cruise Control On Signal Malfunction

This code indicates a malfunction in the cruise control on signal circuit. This circuit is responsible for activating the cruise control system. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.28. P0566 – Cruise Control Off Signal Malfunction

This code suggests a malfunction in the cruise control off signal circuit. This circuit is responsible for deactivating the cruise control system. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.29. P0567 – Cruise Control Resume Signal Malfunction

This code indicates a malfunction in the cruise control resume signal circuit. This circuit is responsible for resuming the cruise control system. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.30. P0568 – Cruise Control Set Signal Malfunction

This code suggests a malfunction in the cruise control set signal circuit. This circuit is responsible for setting the cruise control speed. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.31. P0569 – Cruise Control Coast Signal Malfunction

This code indicates a malfunction in the cruise control coast signal circuit. This circuit is responsible for allowing the vehicle to coast while the cruise control is active. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.32. P0570 – Cruise Control Accel Signal Malfunction

This code suggests a malfunction in the cruise control acceleration signal circuit. This circuit is responsible for allowing the vehicle to accelerate while the cruise control is active. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.33. P0571 – Cruise Control/Brake Switch A Circuit Malfunction

This code indicates a malfunction in the cruise control/brake switch A circuit. This circuit is related to the brake switch and its interaction with the cruise control system. Potential causes include a faulty switch, wiring issues, or problems with the ECU.

2.4.34. P0572 – Cruise Control/Brake Switch A Circuit Low

This code suggests that the signal from the cruise control/brake switch A circuit is lower than expected. Possible causes include a faulty switch, wiring issues, or a problem with the brake system.

2.4.35. P0573 – Cruise Control/Brake Switch A Circuit High

This code indicates that the signal from the cruise control/brake switch A circuit is higher than expected. This could be due to a faulty switch, wiring issues, or problems with the brake system.

2.4.36. P0574 – Cruise Control Related Malfunction

This code suggests a general malfunction related to the cruise control system. This means that there is an issue affecting the cruise control’s functionality, though the exact cause may require further diagnosis.

2.4.37. P0575 – P0580 Cruise Control Related Malfunction

These codes suggest a general malfunction related to the cruise control system. This means that there is an issue affecting the cruise control’s functionality, though the exact cause may require further diagnosis.

2.5. Fault Code P0600 Series

The P0600 series of fault codes typically relates to internal control module malfunctions. These codes indicate issues within the vehicle’s computer systems, which can affect various functions and components.

2.5.1. P0600 – Serial Communication Link Malfunction

This code indicates a malfunction in the serial communication link. This link is used for communication between different control modules in the vehicle. Potential causes include wiring issues, faulty modules, or problems with the vehicle’s network.

2.5.2. P0601 – Internal Control Module Memory Check Sum Error

This code suggests an error in the internal control module’s memory checksum. This could be due to corrupted memory, a faulty module, or problems with the module’s programming.

2.5.3. P0602 – Control Module Programming Error

This code indicates a programming error in the control module. This could be due to incorrect programming, corrupted data, or problems with the module’s software.

2.5.4. P0603 – Internal Control Module Keep Alive Memory (KAM) Error

This code suggests an error in the internal control module’s keep alive memory (KAM). This memory stores data that is retained even when the ignition is turned off. Potential causes include a faulty module, wiring issues, or problems with the vehicle’s electrical system.

2.5.5. P0604 – Internal Control Module Random Access Memory (RAM) Error

This code indicates an error in the internal control module’s random access memory (RAM). This memory is used for temporary data storage. Potential causes include a faulty module, wiring issues, or problems with the vehicle’s electrical system.

2.5.6. P0605 – Internal Control Module Read Only Memory (ROM) Error

This code suggests an error in the internal control module’s read-only memory (ROM). This memory stores the module’s permanent programming. Potential causes include a faulty module, corrupted data, or problems with the module’s hardware.

2.5.7. P0606 – PCM Processor Fault

This code indicates a fault in the powertrain control module (PCM) processor. The PCM controls many of the engine’s functions. Potential causes include a faulty PCM, wiring issues, or problems with the vehicle’s electrical system.

2.5.8. P0608 – Control Module VSS Output “A” Malfunction

This code suggests a malfunction in the control module’s vehicle speed sensor (VSS) output “A”. This output sends vehicle speed information to other systems. Potential causes include a faulty module, wiring issues, or problems with the vehicle’s network.

2.5.9. P0609 – Control Module VSS Output “B” Malfunction

This code indicates a malfunction in the control module’s vehicle speed sensor (VSS) output “B”. This output sends vehicle speed information to other systems. Potential causes include a faulty module, wiring issues, or problems with the vehicle’s network.

2.5.10. P0620 – Generator Control Circuit Malfunction

This code suggests a malfunction in the generator control circuit. The generator (alternator) charges the vehicle’s battery. Potential causes include a faulty generator, wiring issues, or problems with the ECU.

2.5.11. P0621 – Generator Lamp “L” Control Circuit Malfunction

This code indicates a malfunction in the generator lamp “L” control circuit. This circuit controls the battery warning light on the dashboard. Potential causes include a faulty generator, wiring issues, or problems with the ECU.

2.5.12. P0622 – Generator Field “F” Control Circuit Malfunction

This code suggests a malfunction in the generator field “F” control circuit. This circuit controls the generator’s field current. Potential causes include a faulty generator, wiring issues, or problems with the ECU.

2.5.13. P0650 – Malfunction Indicator Lamp (MIL) Control Circuit Malfunction

This code indicates a malfunction in the malfunction indicator lamp (MIL) control circuit. The MIL, also known as the check engine light, illuminates when there is a problem with the vehicle. Potential causes include wiring issues, a faulty bulb, or problems with the ECU.

2.5.14. P0654 – Engine RPM Output Circuit Malfunction

This code suggests a malfunction in the engine RPM output circuit. This circuit sends engine speed information to other systems. Potential causes include wiring issues, a faulty sensor, or problems with the ECU.

2.5.15. P0655 – Engine Hot Lamp Output Control Circuit Malfunction

This code indicates a malfunction in the engine hot lamp output control circuit. This circuit controls the engine temperature warning light on the dashboard. Potential causes include wiring issues, a faulty sensor, or problems with the ECU.

2.5.16. P0656 – Fuel Level Output Circuit Malfunction

This code suggests a malfunction in the fuel level output circuit. This circuit sends fuel level information to the fuel gauge. Potential causes include wiring issues, a faulty fuel level sensor, or problems with the ECU.

2.6. Fault Code P0700 Series

The P0700 series of fault codes typically relates to the transmission control system. These codes indicate issues within the transmission, which can affect shifting, performance, and overall drivability.

2.6.1. P0700 – Transmission Control System Malfunction

This code indicates a general malfunction in the transmission control system. Further diagnosis is required to determine the specific issue.

2.6.2. P0701 – Transmission Control System Range/Performance

This code suggests that the transmission control system is not performing within the expected range. This could be due to various issues, including faulty sensors, solenoid problems, or mechanical failures.

2.6.3. P0702 – Transmission Control System Electrical

This code indicates an electrical problem within the transmission control system. This could be due to wiring issues, faulty solenoids, or problems with the transmission control module (TCM).

2.6.4. P0703 – Torque Converter/Brake Switch B Circuit Malfunction

This code suggests a malfunction in the torque converter/brake switch B circuit. This circuit is related to the brake switch and its interaction with the torque converter clutch. Potential causes include a faulty switch, wiring issues, or problems with the TCM.

2.6.5. P0704 – Clutch Switch Input Circuit Malfunction

This code indicates a malfunction in the clutch switch input circuit. This switch is used in manual transmissions to detect when the clutch is engaged. Potential causes include a faulty switch, wiring issues, or problems with the TCM.

2.6.6. P0705 – Transmission Range Sensor Circuit malfunction (PRNDL Input)

This code suggests a malfunction in the transmission range sensor circuit. This sensor indicates the position of the gear selector (Park, Reverse, Neutral, Drive, Low). Potential causes include a faulty sensor, wiring issues, or problems with the TCM.

2.6.7. P0706 – Transmission Range Sensor Circuit Range/Performance

This code indicates that the transmission range sensor is not performing within the expected range. This could be due to a faulty sensor, misaligned sensor, or problems with the TCM.

2.6.8. P0707 – Transmission Range Sensor Circuit Low Input

This code suggests that the signal from the transmission range sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the sensor’s connection.

2.6.9. P0708 – Transmission Range Sensor Circuit High Input

This code indicates that the signal from the transmission range sensor is higher than expected. This could be due to a faulty sensor, wiring issues, or problems with the TCM.

2.6.10. P0709 – Transmission Range Sensor Circuit Intermittent

This code suggests that the signal from the transmission range sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.6.11. P0710 – Transmission Fluid Temperature Sensor Circuit Malfunction

This code indicates a malfunction in the transmission fluid temperature sensor circuit. This sensor monitors the temperature of the transmission fluid. Potential causes include a faulty sensor, wiring issues, or problems with the TCM.

2.6.12. P0711 – Transmission Fluid Temperature Sensor Circuit Range/Performance

This code suggests that the transmission fluid temperature sensor is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the transmission fluid.

2.6.13. P0712 – Transmission Fluid Temperature Sensor Circuit Low Input

This code indicates that the signal from the transmission fluid temperature sensor is lower than expected. Possible causes include a faulty sensor, wiring issues, or a problem with the sensor’s connection.

2.6.14. P0713 – Transmission Fluid Temperature Sensor Circuit High Input

This code suggests that the signal from the transmission fluid temperature sensor is higher than expected. This could be due to a faulty sensor, wiring issues, or problems with the TCM.

2.6.15. P0714 – Transmission Fluid Temperature Sensor Circuit Intermittent

This code indicates that the signal from the transmission fluid temperature sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.6.16. P0715 – Input/Turbine Speed Sensor Circuit Malfunction

This code suggests a malfunction in the input/turbine speed sensor circuit. This sensor monitors the speed of the transmission’s input shaft. Potential causes include a faulty sensor, wiring issues, or problems with the TCM.

2.6.17. P0716 – Input/Turbine Speed Sensor Circuit Range/Performance

This code indicates that the input/turbine speed sensor is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the transmission’s operation.

2.6.18. P0717 – Input/Turbine Speed Sensor Circuit No Signal

This code suggests that there is no signal from the input/turbine speed sensor circuit. This could be due to a faulty sensor, wiring issues, or a problem with the sensor’s connection.

2.6.19. P0718 – Input/Turbine Speed Sensor Circuit Intermittent

This code indicates that the signal from the input/turbine speed sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.6.20. P0719 – Torque Converter/Brake Switch B Circuit Low

This code suggests that the signal from the torque converter/brake switch B circuit is lower than expected. Potential causes include a faulty switch, wiring issues, or a problem with the brake system.

2.6.21. P0720 – Output Speed Sensor Circuit Malfunction

This code indicates a malfunction in the output speed sensor circuit. This sensor monitors the speed of the transmission’s output shaft. Potential causes include a faulty sensor, wiring issues, or problems with the TCM.

2.6.22. P0721 – Output Speed Sensor Range/Performance

This code suggests that the output speed sensor is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the transmission’s operation.

2.6.23. P0722 – Output Speed Sensor No Signal

This code indicates that there is no signal from the output speed sensor circuit. This could be due to a faulty sensor, wiring issues, or a problem with the sensor’s connection.

2.6.24. P0723 – Output Speed Sensor Intermittent

This code suggests that the signal from the output speed sensor is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.6.25. P0724 – Torque Converter/Brake Switch B Circuit High

This code indicates that the signal from the torque converter/brake switch B circuit is higher than expected. This could be due to a faulty switch, wiring issues, or problems with the brake system.

2.6.26. P0725 – Engine Speed input Circuit Malfunction

This code suggests a malfunction in the engine speed input circuit. This circuit provides engine speed information to the TCM. Potential causes include wiring issues, a faulty sensor, or problems with the ECU.

2.6.27. P0726 – Engine Speed Input Circuit Range/Performance

This code indicates that the engine speed input is not performing within the expected range. This could be due to a faulty sensor, wiring issues, or problems with the engine’s operation.

2.6.28. P0727 – Engine Speed Input Circuit No Signal

This code suggests that there is no signal from the engine speed input circuit. This could be due to wiring issues, a faulty sensor, or a problem with the sensor’s connection.

2.6.29. P0728 – Engine Speed Input Circuit Intermittent

This code indicates that the signal from the engine speed input is unstable or intermittent. This could be due to loose wiring, a failing sensor, or intermittent problems with the sensor’s operation.

2.6.30. P0730 – Incorrect Gear Ratio

This code suggests that the transmission is experiencing an incorrect gear ratio. This could be due to worn gears, solenoid problems, or issues with the TCM.

2.6.31. P0731 – Gear 1 Incorrect Ratio

This code indicates that the transmission is experiencing an incorrect gear ratio in 1st gear. This could be due to worn gears, solenoid problems, or issues with the TCM.

2.6.32. P0732 – Gear 2 Incorrect Ratio

This code suggests that the transmission