OBD II Codes Mercedes Benz: Your Expert Guide
Obd Ii Codes Mercedes Benz are your car’s way of talking, signaling potential problems that need attention. At CARDIAGTECH.NET, we help you decipher these signals, offering solutions to keep your Mercedes-Benz running smoothly and efficiently. Learn about diagnostic trouble codes and car diagnostic tools to ensure your vehicle’s optimal performance.
1. Decoding OBD-II Codes for Mercedes-Benz
Understanding OBD-II codes is crucial for maintaining your Mercedes-Benz. These codes, a standardized system across modern vehicles, act as your car’s way of communicating potential issues within its engine and other vital systems. Think of them as clues that guide you toward diagnosing and resolving problems, ensuring your Mercedes-Benz operates with the efficiency and reliability it’s known for.
The On-Board Diagnostic II (OBD-II) system uses codes to communicate issues about your vehicle’s health.
For service centers and DIYers, these codes offer a starting point for diagnostics, enabling technicians and car owners to quickly identify and address issues. For Mercedes-Benz owners, understanding these codes is just as important. It empowers you with the knowledge to make informed decisions about your vehicle’s maintenance and when to seek professional help. Knowledge of diagnostic information and auto repair tools is a valuable part of Mercedes-Benz ownership, enabling you to keep your car in top condition.
2. The Basics of OBD-II Codes
When the “Check Engine” light illuminates on your Mercedes-Benz dashboard, it’s usually an indication that the vehicle’s computer has detected an issue within the engine or emission system. The OBD-II system stores a specific code, or sometimes multiple codes, that corresponds to the particular issue detected.
Every modern vehicle, including Mercedes-Benz models, is equipped with an OBD-II port. This port is typically located under the dashboard, near the steering column, and serves as a gateway for diagnosing vehicle issues. By connecting an OBD-II scanner to this port, technicians and vehicle owners can retrieve the stored codes. These codes are alphanumeric and usually consist of a letter followed by four numbers (e.g., P0300). Each code points to a specific issue, ranging from something as simple as a loose gas cap to more complex engine problems.
Use an OBD-II scanner to retrieve stored codes and diagnose potential issues in your Mercedes-Benz.
These codes are instrumental in maintaining the vehicle’s sophisticated systems. Mercedes-Benz cars are engineered with precision, and the OBD-II system plays a significant role in ensuring that every aspect of the vehicle functions as intended. When a Mercedes-Benz displays an OBD-II code, it alerts the owner or technician to a potential issue that might need attention. This early detection is key in preventing minor issues from escalating into major repairs, thereby maintaining the car’s performance and extending its lifespan. Utilizing car maintenance and vehicle diagnostic services ensures your Mercedes-Benz remains in peak condition.
3. Dissecting the Anatomy of an OBD-II Code
Let’s break down the structure of an OBD-II code to better understand its components and what they signify:
-
First Character: The first character in an OBD-II code is always a letter, representing the system or area of the vehicle where the problem is detected.
- P: Powertrain (Engine and Transmission)
- C: Chassis (ABS, Traction Control)
- B: Body (Airbags, Climate Control)
- U: Network Communication (CAN Bus, LAN)
-
Next Two Characters: These numeric characters provide more specific information about the issue within the system indicated by the first character. For example, a P0300 code refers to a random misfire in the engine.
-
Hyphen or Space: After the first three characters, there is usually a hyphen or space to separate them from the next character.
-
Fourth Character: The fourth character is a numeric digit, and it provides additional information about the problem. It often indicates the severity or location of the issue. For example, a P0301 code might indicate a misfire in cylinder 1.
-
Remaining Characters (Optional): Some OBD-II codes may have additional characters following the fourth character. These characters can provide even more specific information about the problem, such as the exact component or sensor involved.
| Character | Description | Example |
|---|---|---|
| First | System (Powertrain, Chassis, Body, Network) | P, C, B, U |
| Second & Third | Specific information about the issue | 03 (Misfire) |
| Fourth | Severity or location of the issue | 01 (Cylinder 1) |
| Remaining | Specific component or sensor involved | (e.g., P0301 can have additional characters) |
Understanding these components allows for a more informed approach to vehicle maintenance and repair. Knowing this information empowers you to understand your car’s computer which is vital for proper car care and preventative maintenance.
4. Generic Codes vs. Manufacturer-Specific Codes
Understanding the difference between generic and manufacturer-specific codes is vital for accurate diagnosis and repair:
- Generic Codes: Standardized across all vehicle manufacturers and defined by the Society of Automotive Engineers (SAE). These codes provide general information about a problem’s location and nature but may not offer precise details. They are typically in the format P0xxx, where “P” stands for Powertrain, and the next two digits provide more information.
- Manufacturer-Specific Codes: Mercedes-Benz vehicles have their own set of manufacturer-specific codes. These codes typically start with “P1” followed by two digits. For example, a P1400 code on a Mercedes vehicle would be a manufacturer-specific code. These codes, also known as enhanced or enhanced manufacturer-specific codes, offer more specific and detailed information about issues and often include additional codes beyond the generic ones.
Manufacturer-specific codes provide a deeper level of insight into your vehicle’s issues, but require a scanner that can read them. Knowing the difference helps technicians and car owners identify issues quickly. This quick diagnosis allows for more efficient car service and timely auto repairs.
5. Common Mercedes-Benz OBD-II Codes and Their Meanings
Let’s dive into some common Mercedes-Benz OBD-II codes, exploring their descriptions, possible causes, and solutions:
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0100 | Mass Air Flow (MAF) Circuit Malfunction | Dirty/faulty MAF sensor, air leaks, damaged wiring | Clean/replace MAF sensor, check for air leaks, repair wiring | MAF sensors, air filters, wiring harnesses |
| P0130 | O2 Sensor Circuit Malfunction (Bank 1, Sensor 1) | Faulty sensor, wiring issues, exhaust leaks | Replace O2 sensor, repair wiring, fix exhaust leaks | Oxygen sensors, exhaust components, wiring harnesses |
| P0171 | System Too Lean (Bank 1) | Vacuum leaks, fuel injection issues, air intake problems | Check/repair vacuum leaks, inspect fuel injectors, clean air intake | Vacuum hoses, fuel injectors, air intake components |
| P0300 | Random/Multiple Cylinder Misfire Detected | Faulty spark plugs, ignition coils, distributor issues | Replace spark plugs, ignition coils, repair distributor | Spark plugs, ignition coils, distributor components |
| P0410 | Secondary Air Injection System Malfunction | Faulty air pump, blocked hoses, faulty valves | Replace air pump, clear hoses, replace valves | Air pumps, air injection hoses, valves |
| P0500 | Vehicle Speed Sensor Malfunction | Faulty speed sensor, wiring issues, malfunctioning dashboard | Replace speed sensor, repair wiring, check dashboard | Speed sensors, wiring harnesses |
| P0560 | System Voltage Malfunction | Weak battery, faulty alternator, bad connections | Test/replace battery, repair/replace alternator, check connections | Batteries, alternators, electrical components |
| P0700 | Transmission Control System Malfunction | Transmission sensor failures, fluid problems, ECM issues | Check fluid, replace sensors, inspect ECM | Transmission sensors, transmission fluid, ECM components |
| P0720 | Output Speed Sensor Circuit Malfunction | Defective speed sensor, wiring problems | Replace output speed sensor, check/repair wiring | Speed sensors, transmission parts |
| P0730 | Incorrect Gear Ratio | Transmission slipping, hydraulic problems, sensor issues | Check slippage, repair hydraulics, replace sensors | Transmission rebuild kits, hydraulic components, sensors |
| P2006 | Intake Manifold Runner Control Stuck Closed Bank 1 | Faulty control valve, vacuum leak, mechanical failure | Replace control valve, repair vacuum leaks, inspect manifold | Intake manifold components, control valves |
| P2187 | System Too Lean at Idle (Bank 1) | Vacuum leaks, faulty fuel injectors, air metering issues | Repair vacuum leaks, replace fuel injectors, check air flow | Fuel injectors, vacuum components, air flow sensors |
These codes are a starting point, and further investigation is often required to pinpoint the exact cause and solution. Using the right auto diagnostic equipment from CARDIAGTECH.NET will help make the process easier.
6. Detailed Breakdown of Mercedes-Benz OBD-II Codes
For a comprehensive understanding, let’s explore a detailed list of Mercedes-Benz OBD-II codes, categorized by their respective systems:
6.1. P0400 Mercedes Fault Codes
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0466 | Purge Flow Sensor Circuit Range/Performance | Faulty purge flow sensor, clogged purge lines, electrical issues | Replace sensor, clear lines, check electrical connections | Purge flow sensors, emission components |
| P0467 | Purge Flow Sensor Circuit Low Input | Short circuit in sensor, poor electrical connection | Inspect wiring, secure connections | Wiring harnesses, electrical connectors |
| P0468 | Purge Flow Sensor Circuit High Input | Open circuit in sensor, poor electrical connection | Check for open circuits, ensure good connections | Electrical repair kits, purge flow sensors |
| P0469 | Purge Flow Sensor Circuit Intermittent | Loose connections, intermittent short/open circuits | Tighten connections, inspect wiring | Electrical testing tools, wiring components |
| P0470 | Exhaust Pressure Sensor Malfunction | Faulty sensor, exhaust leaks, wiring issues | Replace sensor, repair leaks, check wiring | Exhaust pressure sensors, exhaust components |
| P0471 | Exhaust Pressure Sensor Range/Performance | Faulty sensor, clogged exhaust, wiring problems | Replace sensor, unclog exhaust, repair wiring | Exhaust sensors, exhaust repair kits |
| P0472 | Exhaust Pressure Sensor Low | Short circuit in sensor wiring, faulty sensor | Check wiring, replace sensor | Wiring repair components, exhaust sensors |
| P0473 | Exhaust Pressure Sensor High | Open circuit in sensor wiring, faulty sensor | Check for open circuits, replace sensor | Exhaust pressure sensors, wiring kits |
| P0474 | Exhaust Pressure Sensor Intermittent | Loose connections, intermittent wiring faults | Secure connections, inspect wiring | Wiring components, exhaust pressure sensors |
| P0475 | Exhaust Pressure Control Valve Malfunction | Faulty control valve, clogged exhaust, wiring issues | Replace valve, clear exhaust, repair wiring | Exhaust control valves, exhaust components |
| P0476 | Exhaust Pressure Control Valve Range/Performance | Sticking/faulty valve, clogged exhaust, sensor issues | Replace/clean valve, unclog exhaust, check sensors | Exhaust valves, sensors, exhaust maintenance kits |
| P0477 | Exhaust Pressure Control Valve Low | Short circuit in valve circuit, faulty valve | Inspect wiring, replace valve | Wiring repair components, exhaust valves |
| P0478 | Exhaust Pressure Control Valve High | Open circuit in valve circuit, faulty valve | Check for open circuits, replace valve | Electrical repair kits, exhaust valves |
| P0479 | Exhaust Pressure Control Valve Intermittent | Loose connections, intermittent wiring faults | Tighten connections, inspect wiring | Electrical connectors, exhaust valves |
| P0480 | Cooling Fan 1 Control Circuit Malfunction | Faulty fan control relay, wiring issues, faulty fan motor | Replace relay, repair wiring, replace fan motor | Cooling fan components, relays, wiring harnesses |
| P0481 | Cooling Fan 2 Control Circuit Malfunction | Defective fan control relay, wiring problems, faulty fan | Replace relay, check/repair wiring, replace fan | Cooling system components, electrical repair parts |
| P0482 | Cooling Fan 3 Control Circuit Malfunction | Malfunctioning fan relay, wiring faults, defective fan | Replace relay, repair wiring, replace fan | Cooling fans, fan relays, wiring kits |
| P0483 | Cooling Fan Rationality Check Malfunction | Faulty fan motor, control module, sensor faults | Replace fan motor, inspect module, replace sensors | Cooling fans, control modules, sensors |
| P0484 | Cooling Fan Circuit Over Current | Short circuit in fan motor, wiring, control module faults | Inspect/repair wiring, replace fan motor, check/repair module | Cooling fans, wiring harnesses, control modules |
| P0485 | Cooling Fan Power/Ground Circuit Malfunction | Faulty connections, damaged wiring, malfunctioning module, ground issues | Check/repair connections, inspect/repair wiring, replace/repair module | Cooling fans, electrical connectors, wiring harnesses, control modules |
6.2. P0500 Mercedes Fault Codes
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0500 | Vehicle Speed Sensor “A” Malfunction | Faulty speed sensor, damaged wiring, malfunctioning speedometer, ECU issues | Replace sensor, inspect/repair wiring, check speedometer/ECU | Vehicle speed sensors, wiring harnesses |
| P0501 | Vehicle Speed Sensor “A” Range/Performance | Malfunctioning sensor, intermittent wiring, faulty speedometer, ECU problems | Replace/recalibrate sensor, check/repair wiring, inspect speedometer/ECU | Vehicle speed sensors, wiring harnesses |
| P0502 | Vehicle Speed Sensor “A” Circuit Low Input | Short circuit in wiring, faulty sensor, ECU issues | Inspect/repair wiring, replace sensor, check ECU | Vehicle speed sensors, wiring harnesses |
| P0503 | Vehicle Speed Sensor “A” Intermittent/Erratic/High | Faulty sensor, wiring issues, speedometer/ECU faults | Replace sensor, inspect/repair wiring, check speedometer/ECU | Vehicle speed sensors, wiring harnesses |
| P0504 | Brake Switch “A”/”B” Correlation | Faulty brake light switch, misaligned switches, wiring issues | Adjust/replace switch, inspect/repair wiring | Brake light switches, wiring harnesses |
| P0505 | Idle Control System Malfunction | Faulty idle air control valve, vacuum leaks, throttle body issues, ECU problems | Replace/clean valve, check/repair leaks, inspect throttle body/ECU | Idle air control valves, vacuum hoses |
| P0506 | Idle Control System RPM Lower Than Expected | Dirty/faulty idle air control valve, vacuum leaks, throttle body/ECU issues | Clean/replace valve, repair leaks, inspect throttle body/ECU | Idle air control valves, vacuum hoses |
| P0507 | Idle Control System RPM Higher Than Expected | Sticking idle air control valve, vacuum leaks, throttle body malfunctions, ECU issues | Replace/clean valve, check/repair leaks, inspect throttle body/ECU | Idle air control valves, vacuum hoses |
| P0510 | Closed Throttle Position Switch Malfunction | Faulty switch, misaligned switch, wiring issues | Replace/adjust switch, inspect/repair wiring | Throttle position switches, wiring harnesses |
| P0520 | Engine Oil Pressure Sensor/Switch Circuit Malfunction | Faulty sensor/switch, wiring issues, oil level/quality problems | Replace sensor/switch, check/repair wiring, ensure correct oil level/quality | Oil pressure sensors/switches, wiring harnesses |
| P0521 | Engine Oil Pressure Sensor/Switch Circuit Range/Performance | Malfunctioning sensor, wiring issues, incorrect oil viscosity | Replace/recalibrate sensor, inspect wiring, use correct viscosity | Oil pressure sensors, wiring harnesses |
| P0522 | Engine Oil Pressure Sensor/Switch Circuit Low Voltage | Short circuit in wiring, faulty sensor, low oil level | Inspect/repair wiring, replace sensor, check/refill oil | Oil pressure sensors, wiring harnesses |
| P0523 | Engine Oil Pressure Sensor/Switch Circuit High Voltage | Open circuit in wiring, faulty sensor | Inspect/repair wiring, replace sensor | Oil pressure sensors, wiring harnesses |
| P0530 | A/C Refrigerant Pressure Sensor Circuit Malfunction | Faulty sensor, wiring issues, refrigerant level problems | Replace sensor, check/repair wiring, ensure correct refrigerant level | A/C pressure sensors, wiring harnesses |
| P0531 | A/C Refrigerant Pressure Sensor Circuit Range/Performance | Malfunctioning sensor, wiring issues, incorrect refrigerant charge | Replace/recalibrate sensor, inspect wiring, correct refrigerant charge | A/C pressure sensors, wiring harnesses |
| P0532 | A/C Refrigerant Pressure Sensor Circuit Low Input | Low refrigerant level, short circuit in wiring, faulty sensor | Refill refrigerant, inspect/repair wiring, replace sensor | A/C pressure sensors, wiring harnesses, refrigerants |
| P0533 | A/C Refrigerant Pressure Sensor Circuit High Input | Overcharged refrigerant system, open circuit in wiring, faulty sensor | Adjust refrigerant charge, inspect/repair wiring, replace sensor | A/C pressure sensors, wiring harnesses, refrigerants |
| P0534 | Air Conditioner Refrigerant Charge Loss | Refrigerant leaks, faulty A/C compressor, damaged components | Check/repair leaks, replace faulty components | A/C refrigerants, compressors, components |
| P0550 | Power Steering Pressure Sensor Circuit Malfunction | Faulty sensor, wiring issues, power steering fluid level/quality | Replace sensor, check/repair wiring, ensure correct fluid level/quality | Power steering pressure sensors, wiring harnesses |
| P0551 | Power Steering Pressure Sensor Circuit Range/Performance | Malfunctioning sensor, wiring issues, power steering pump faults | Replace/recalibrate sensor, inspect wiring, check pump | Power steering pressure sensors, wiring harnesses |
| P0552 | Power Steering Pressure Sensor Circuit Low Input | Low fluid level, short circuit in wiring, faulty sensor | Refill fluid, inspect/repair wiring, replace sensor | Power steering pressure sensors, wiring harnesses |
| P0553 | Power Steering Pressure Sensor Circuit High Input | Faulty sensor, open circuit in wiring | Replace sensor, inspect/repair wiring | Power steering pressure sensors, wiring harnesses |
| P0554 | Power Steering Pressure Sensor Circuit Intermittent | Intermittent wiring issues, failing sensor | Inspect/repair wiring, replace sensor if necessary | Power steering pressure sensors, wiring harnesses |
| P0560 | System Voltage Malfunction | Faulty battery, alternator issues, wiring problems | Check/replace battery, inspect/repair alternator, check wiring | Batteries, alternators, wiring harnesses |
| P0561 | System Voltage Unstable | Alternator malfunctioning, poor battery condition, electrical issues | Test/replace alternator, inspect battery, check for faults | Alternators, batteries, components |
| P0562 | System Voltage Low | Weak/failing battery, alternator not charging, wiring issues | Test/replace battery, check alternator, inspect wiring | Batteries, alternators, connectors |
| P0563 | System Voltage High | Faulty regulator, alternator issues, malfunctions | Replace/repair regulator, inspect alternator, check system | Voltage regulators, alternators, components |
| P0565 | Cruise Control On Signal Malfunction | Faulty switch, wiring issues, module faults | Replace switch, inspect/repair wiring, check module | Cruise control switches, wiring harnesses |
| P0566 | Cruise Control Off Signal Malfunction | Faulty switch, wiring problems, module defects | Replace switch, check/repair wiring, inspect module | Cruise control switches, wiring harnesses |
| P0567 | Cruise Control Resume Signal Malfunction | Malfunctioning switch, wiring issues, module faults | Replace switch, inspect/repair wiring, check module | Cruise control switches, wiring harnesses |
| P0568 | Cruise Control Set Signal Malfunction | Defective switch, wiring problems, module issues | Replace switch, check/repair wiring, inspect module | Cruise control switches, wiring harnesses |
| P0569 | Cruise Control Coast Signal Malfunction | Faulty switch, wiring issues, module problems | Replace switch, inspect/repair wiring, check module | Cruise control switches, wiring harnesses |
| P0570 | Cruise Control Accel Signal Malfunction | Malfunctioning switch, wiring problems, module faults | Replace switch, check/repair wiring, inspect module | Cruise control switches, wiring harnesses |
| P0571 | Cruise Control/Brake Switch A Circuit Malfunction | Faulty brake switch, wiring issues, cruise control faults | Replace brake switch, inspect/repair wiring, check cruise control | Brake switches, wiring harnesses |
| P0572 | Cruise Control/Brake Switch A Circuit Low | Short circuit in wiring, faulty brake switch | Inspect/repair wiring, replace brake switch | Brake switches, wiring harnesses |
| P0573 | Cruise Control/Brake Switch A Circuit High | Open circuit in wiring, faulty brake switch | Inspect/repair wiring, replace brake switch | Brake switches, wiring harnesses |
| P0574 to P0580 | Cruise Control Related Malfunctions | Varying causes (module, wiring, sensors, switches) | Replace module, repair wiring, replace sensors/switches | Cruise control modules, harnesses, sensors, switches |
6.3. P0600 Mercedes Fault Codes
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0600 | Serial Communication Link Malfunction | Faulty wiring, poor connections, module issues | Inspect/repair wiring, ensure connections, address module problems | Wiring harnesses, control modules |
| P0601 | Internal Control Module Memory Check Sum Error | Faulty module memory, programming errors | Evaluate/replace module, reprogram as necessary | Control modules |
| P0602 | Control Module Programming Error | Incorrect programming, software issues | Reprogram module with correct software | Control modules, programming tools |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error | Faulty module KAM, wiring issues | Evaluate/replace module, inspect/repair wiring | Control modules, wiring harnesses |
| P0604 | Internal Control Module Random Access Memory (RAM) Error | Faulty module RAM, wiring issues | Evaluate/replace module, inspect/repair wiring | Control modules, wiring harnesses |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | Faulty module ROM, wiring issues | Evaluate/replace module, inspect/repair wiring | Control modules, wiring harnesses |
| P0606 | PCM Processor Fault | Faulty PCM, wiring issues | Evaluate/replace PCM, inspect/repair wiring | PCM, wiring harnesses |
| P0608 | Control Module VSS Output “A” Malfunction | Faulty VSS, wiring issues | Evaluate/replace VSS, inspect/repair wiring | Vehicle Speed Sensors, wiring harnesses |
| P0609 | Control Module VSS Output “B” Malfunction | Faulty VSS, wiring issues | Evaluate/replace VSS, inspect/repair wiring | Vehicle Speed Sensors, wiring harnesses |
| P0620 | Generator Control Circuit Malfunction | Faulty generator, wiring issues | Evaluate/replace generator, inspect/repair wiring | Generators, wiring harnesses |
| P0621 | Generator Lamp “L” Control Circuit Malfunction | Faulty generator lamp, wiring issues | Evaluate/replace lamp, inspect/repair wiring | Generator lamps, wiring harnesses |
| P0622 | Generator Field “F” Control Circuit Malfunction | Faulty generator field control, wiring issues | Evaluate/replace control, inspect/repair wiring | Generator field controls, wiring harnesses |
| P0650 | Malfunction Indicator Lamp (MIL) Control Circuit Malfunction | Faulty MIL, wiring issues | Evaluate/replace MIL, inspect/repair wiring | Malfunction Indicator Lamps, wiring harnesses |
| P0654 | Engine RPM Output Circuit Malfunction | Faulty RPM sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | RPM sensors, wiring harnesses |
| P0655 | Engine Hot Lamp Output Control Circuit Malfunction | Faulty engine hot lamp, wiring issues | Evaluate/replace lamp, inspect/repair wiring | Engine hot lamps, wiring harnesses |
| P0656 | Fuel Level Output Circuit Malfunction | Faulty fuel level sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Fuel level sensors, wiring harnesses |
6.4. P0700 Mercedes Fault Codes
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0700 | Transmission Control System Malfunction | Wiring issues, faulty module, sensor problems | Inspect/repair wiring, replace module, address sensor issues | Transmission control modules, sensors |
| P0701 | Transmission Control System Range/Performance | Faulty module, sensor problems | Evaluate/replace module, address sensor issues | Transmission control modules, sensors |
| P0702 | Transmission Control System Electrical | Wiring issues, faulty module, sensor problems | Inspect/repair wiring, replace module, address sensor issues | Transmission control modules, sensors |
| P0703 | Torque Converter/Brake Switch B Circuit Malfunction | Open circuit, faulty converter/switch | Inspect/repair wiring, replace converter/switch | Torque converters, brake switches |
| P0704 | Clutch Switch Input Circuit Malfunction | Open circuit, faulty clutch switch | Inspect/repair wiring, replace clutch switch | Clutch switches |
| P0705 | Transmission Range Sensor Circuit malfunction (PRNDL Input) | Faulty range sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Transmission range sensors, harnesses |
| P0706 | Transmission Range Sensor Circuit Range/Performance | Faulty range sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Transmission range sensors, harnesses |
| P0707 | Transmission Range Sensor Circuit Low Input | Faulty range sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Transmission range sensors, harnesses |
| P0708 | Transmission Range Sensor Circuit High Input | Faulty range sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Transmission range sensors, harnesses |
| P0709 | Transmission Range Sensor Circuit Intermittent | Faulty range sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Transmission range sensors, harnesses |
| P0710 | Transmission Fluid Temperature Sensor Circuit Malfunction | Faulty temperature sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Temperature sensors, harnesses |
| P0711 | Transmission Fluid Temperature Sensor Circuit Range/Performance | Faulty temperature sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Temperature sensors, harnesses |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low Input | Faulty temperature sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Temperature sensors, harnesses |
| P0713 | Transmission Fluid Temperature Sensor Circuit High Input | Faulty temperature sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Temperature sensors, harnesses |
| P0714 | Transmission Fluid Temperature Sensor Circuit Intermittent | Faulty temperature sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Temperature sensors, harnesses |
| P0715 | Input/Turbine Speed Sensor Circuit Malfunction | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0716 | Input/Turbine Speed Sensor Circuit Range/Performance | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0717 | Input/Turbine Speed Sensor Circuit No Signal | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0718 | Input/Turbine Speed Sensor Circuit Intermittent | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0719 | Torque Converter/Brake Switch B Circuit Low | Open circuit, faulty converter/switch | Inspect/repair wiring, replace converter/switch | Torque converters, brake switches |
| P0720 | Output Speed Sensor Circuit Malfunction | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0721 | Output Speed Sensor Range/Performance | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0722 | Output Speed Sensor No Signal | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0723 | Output Speed Sensor Intermittent | Faulty speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Speed sensors, harnesses |
| P0724 | Torque Converter/Brake Switch B Circuit High | Open circuit, faulty converter/switch | Inspect/repair wiring, replace converter/switch | Torque converters, brake switches |
| P0725 | Engine Speed input Circuit Malfunction | Faulty engine speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Engine speed sensors, harnesses |
| P0726 | Engine Speed Input Circuit Range/Performance | Faulty engine speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Engine speed sensors, harnesses |
| P0727 | Engine Speed Input Circuit No Signal | Faulty engine speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Engine speed sensors, harnesses |
| P0728 | Engine Speed Input Circuit Intermittent | Faulty engine speed sensor, wiring issues | Evaluate/replace sensor, inspect/repair wiring | Engine speed sensors, harnesses |
| P0730 | Incorrect Gear Ratio | Faulty sensors, transmission components | Evaluate/replace sensors, inspect transmission components | Sensors, transmission components |
| P0731 to P0736 | Gear Incorrect Ratio (1-5 & Reverse) | Faulty sensors, transmission components | Evaluate/replace sensors, inspect transmission components | Sensors, transmission components |
| P0740 | Torque Converter Clutch Circuit Malfunction | Faulty torque converter, wiring issues | Evaluate/replace converter, inspect/repair wiring | Torque converters, wiring harnesses |
| P0741 | Torque Converter Clutch Circuit Performance or Stuck Off | Faulty torque converter, wiring issues | Evaluate/replace converter, inspect/repair wiring | Torque converters, wiring harnesses |
| P0742 | Torque Converter Clutch Circuit Stuck On | Faulty torque converter, wiring issues | Evaluate/replace converter, inspect/repair wiring | Torque converters, wiring harnesses |
| P0743 | Torque Converter Clutch Circuit Electrical | Faulty torque converter, wiring issues | Evaluate/replace converter, inspect/repair wiring | Torque converters, wiring harnesses |
| P0744 | Torque Converter Clutch Circuit Intermittent | Faulty torque converter, wiring issues | Evaluate/replace converter, inspect/repair wiring | Torque converters, wiring harnesses |
| P0745 | Pressure Control Solenoid Malfunction | Faulty solenoid, wiring issues | Evaluate/replace solenoid, inspect/repair wiring | Pressure control solenoids, harnesses |
| P0746 | Pressure Control Solenoid Performance or Stuck Off | Faulty solenoid, wiring issues | Evaluate/replace solenoid, inspect/repair wiring | Pressure control solenoids, harnesses |
| P0747 | Pressure Control Solenoid Stuck On | Faulty solenoid, wiring issues | Evaluate/replace solenoid, inspect/repair wiring | Pressure control solenoids, harnesses |
| P0748 | Pressure Control Solenoid Electrical | Faulty solenoid, wiring issues | Evaluate/replace solenoid, inspect/repair wiring | Pressure control solenoids, harnesses |
| P0749 | Pressure Control Solenoid Intermittent | Faulty solenoid, wiring issues | Evaluate/replace solenoid, inspect/repair wiring | Pressure control solenoids, harnesses |
| P0750 to P0774 | Shift Solenoid Malfunctions (A-E) | Faulty solenoids, wiring issues | Evaluate/replace solenoids, inspect/repair wiring | Shift solenoids, wiring harnesses |
| P0780 to P0784 | Shift Malfunctions (1-2 to 4-5) | Faulty sensors, transmission components | Evaluate/replace sensors, inspect transmission components | Sensors, transmission components |
| P0785 to P0789 | Shift/Timing Solenoid Malfunctions | Faulty Shift/Timing Solenoid, wiring | Evaluate/replace Solenoid, inspect/repair wiring | Shift/Timing Solenoids, harnesses |
| P0790 | Normal/Performance Switch Circuit Malfunction | Faulty switch, wiring issues | Evaluate/replace switch, inspect/repair wiring | Switches, wiring harnesses |
6.5. P0800 Mercedes Fault Codes
| Code | Description | Possible Causes | Solutions | CARDIAGTECH.NET Products |
|---|---|---|---|---|
| P0801 | Reverse Inhibit Control Circuit Malfunction | Faulty solenoid, wiring issues, ECM problems | Inspect/replace solenoid, repair wiring, diagnose ECM | Solenoids, wiring harnesses, ECM components |
| P0803 | 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction | Faulty solenoid, damaged wiring | Replace solenoid, repair wiring | Skip shift solenoids, |