Mercedes Benz Truck Fault Codes List: Your Ultimate Guide
Mercedes-Benz trucks are renowned for their advanced technology and robust performance. To ensure these vehicles operate at their peak, a complex network of onboard computers continuously monitors various systems. When a malfunction occurs, the system generates a fault code, also known as a Diagnostic Trouble Code (DTC). Understanding these codes is crucial for accurate diagnosis and efficient repair. This comprehensive guide, brought to you by CARDIAGTECH.NET, provides an in-depth look at Mercedes Benz truck fault codes, helping you quickly identify and resolve issues. Arm yourself with the knowledge to keep your Mercedes-Benz truck running smoothly and maximize uptime.
1. Understanding Mercedes Benz Truck Fault Codes
Fault codes, or Diagnostic Trouble Codes (DTCs), are essential for identifying malfunctions within your Mercedes-Benz truck. These codes are generated by the truck’s onboard computer when it detects a problem, acting as a guide for technicians to pinpoint the source of the issue. They cover a wide array of systems, including the engine, transmission, braking system, and more. Being able to interpret these codes accurately is the first step in effective truck maintenance and repair. With the right tools and understanding, resolving these issues becomes more efficient and cost-effective.
1.1. What are Fault Codes?
Fault codes are alphanumeric codes generated by a vehicle’s onboard diagnostic system. These codes indicate a specific problem or malfunction detected by the vehicle’s sensors and computers. In Mercedes-Benz trucks, these codes help technicians quickly identify and address issues, ensuring optimal performance and minimizing downtime.
1.2. Why are Fault Codes Important?
Fault codes are critical because they provide valuable insights into the health of your Mercedes-Benz truck. They help in:
- Accurate Diagnosis: Quickly identify the root cause of a problem.
- Efficient Repairs: Streamline the repair process, saving time and money.
- Preventive Maintenance: Detect potential issues before they escalate into major problems.
- Maintaining Performance: Ensure your truck operates at its optimal level.
- Reducing Downtime: Get your truck back on the road faster.
By understanding and addressing fault codes promptly, you can maintain the reliability and longevity of your Mercedes-Benz truck.
1.3. Where to Find Fault Codes
To access fault codes on your Mercedes-Benz truck, you will typically need a diagnostic tool that can connect to the vehicle’s On-Board Diagnostics (OBD) port. Here’s a step-by-step guide:
- Locate the OBD Port: The OBD port is usually found under the dashboard, near the steering column.
- Connect the Diagnostic Tool: Plug the diagnostic tool into the OBD port.
- Turn on the Ignition: Turn the ignition key to the “on” position, but do not start the engine.
- Follow the Tool’s Instructions: Use the diagnostic tool’s interface to read the fault codes.
- Record the Codes: Write down the fault codes for further analysis.
Alternatively, professional mechanics at service centers like CARDIAGTECH.NET can retrieve these codes for you using advanced diagnostic equipment.
2. Comprehensive Mercedes Benz Truck Fault Codes List
Understanding the fault codes specific to Mercedes-Benz trucks is crucial for effective diagnostics and repairs. Below is an extensive list categorized by code series, providing meanings, possible causes, and potential solutions to address these issues promptly.
2.1. P0100 – P0199: Fuel and Air Metering
This series of codes relates to issues with the fuel and air mixture in the engine.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0100 | Mass Air Flow Circuit Malfunction | Dirty or faulty MAF sensor, vacuum leaks, wiring issues |
| P0102 | Mass Air Flow Circuit Low Input | Faulty MAF sensor, wiring problems, vacuum leaks |
| P0103 | Mass Air Flow Circuit High Input | Faulty MAF sensor, wiring issues |
| P0110 | Intake Air Temperature Circuit Malfunction | Faulty IAT sensor, wiring issues |
| P0112 | Intake Air Temperature Circuit Low Input | Faulty IAT sensor, wiring problems |
| P0113 | Intake Air Temperature Circuit High Input | Faulty IAT sensor, wiring issues |
| P0116 | Engine Coolant Temperature Circuit Range/Performance | Faulty ECT sensor, thermostat issues, cooling system problems |
| P0117 | Engine Coolant Temperature Circuit Low Input | Faulty ECT sensor, wiring problems |
| P0118 | Engine Coolant Temperature Circuit High Input | Faulty ECT sensor, wiring issues |
| P0120 | Throttle/Pedal Position Sensor/Switch A Circuit Malfunction | Faulty TPS, wiring issues |
| P0121 | Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance | Faulty TPS, throttle body issues, wiring problems |
| P0122 | Throttle/Pedal Position Sensor/Switch A Circuit Low Input | Faulty TPS, wiring problems |
| P0123 | Throttle/Pedal Position Sensor/Switch A Circuit High Input | Faulty TPS, wiring issues |
| P0125 | Insufficient Coolant Temperature for Closed Loop Fuel Control | Faulty ECT sensor, thermostat issues, cooling system problems |
| P0130 | O2 Sensor Circuit Malfunction (Bank 1, Sensor 1) | Faulty O2 sensor, exhaust leaks, wiring issues |
| P0131 | O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0132 | O2 Sensor Circuit High Voltage (Bank 1, Sensor 1) | Faulty O2 sensor, wiring issues |
| P0133 | O2 Sensor Circuit Slow Response (Bank 1, Sensor 1) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0134 | O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0135 | O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1) | Faulty O2 sensor, wiring issues |
| P0136 | O2 Sensor Circuit Malfunction (Bank 1, Sensor 2) | Faulty O2 sensor, exhaust leaks, wiring issues |
| P0137 | O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0138 | O2 Sensor Circuit High Voltage (Bank 1, Sensor 2) | Faulty O2 sensor, wiring issues |
| P0139 | O2 Sensor Circuit Slow Response (Bank 1, Sensor 2) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0140 | O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 2) | Faulty O2 sensor, exhaust leaks, wiring problems |
| P0141 | O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) | Faulty O2 sensor, wiring issues |
| P0170 | Fuel Trim Malfunction (Bank 1) | Vacuum leaks, faulty O2 sensor, fuel injector issues, MAF sensor problems |
| P0171 | System Too Lean (Bank 1) | Vacuum leaks, faulty O2 sensor, fuel injector issues, MAF sensor problems |
| P0172 | System Too Rich (Bank 1) | Faulty O2 sensor, fuel injector issues, MAF sensor problems, fuel pressure regulator problems |
The complex engine bay of a Mercedes-Benz truck, highlighting the importance of accurate fault code diagnostics for maintaining peak performance.
2.2. P0200 – P0299: Injector Circuit
These codes indicate problems with the fuel injectors and their circuits.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0200 | Injector Circuit Malfunction | Faulty injector, wiring issues, ECM problems |
| P0201 | Injector Circuit Malfunction – Cylinder 1 | Faulty injector, wiring problems, ECM problems |
| P0202 | Injector Circuit Malfunction – Cylinder 2 | Faulty injector, wiring problems, ECM problems |
| P0203 | Injector Circuit Malfunction – Cylinder 3 | Faulty injector, wiring problems, ECM problems |
| P0204 | Injector Circuit Malfunction – Cylinder 4 | Faulty injector, wiring problems, ECM problems |
| P0205 | Injector Circuit Malfunction – Cylinder 5 | Faulty injector, wiring problems, ECM problems |
| P0206 | Injector Circuit Malfunction – Cylinder 6 | Faulty injector, wiring problems, ECM problems |
| P0261 | Cylinder 1 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0262 | Cylinder 1 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0264 | Cylinder 2 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0265 | Cylinder 2 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0267 | Cylinder 3 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0268 | Cylinder 3 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0270 | Cylinder 4 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0271 | Cylinder 4 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0273 | Cylinder 5 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0274 | Cylinder 5 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0276 | Cylinder 6 Injector Circuit Low | Faulty injector, wiring problems, ECM problems |
| P0277 | Cylinder 6 Injector Circuit High | Faulty injector, wiring problems, ECM problems |
| P0299 | Turbocharger/Supercharger Underboost Condition | Boost leaks, faulty turbocharger, faulty boost sensor, wastegate issues, exhaust leaks |
2.3. P0300 – P0399: Misfire
These codes relate to engine misfires.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0300 | Random/Multiple Cylinder Misfire Detected | Faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, timing issues |
| P0301 | Cylinder 1 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0302 | Cylinder 2 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0303 | Cylinder 3 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0304 | Cylinder 4 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0305 | Cylinder 5 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0306 | Cylinder 6 Misfire Detected | Faulty spark plug, ignition coil, fuel injector, vacuum leak, low compression |
| P0325 | Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues, loose sensor |
| P0326 | Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues |
| P0327 | Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues |
| P0328 | Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor) | Faulty knock sensor, wiring issues |
| P0335 | Crankshaft Position Sensor A Circuit Malfunction | Faulty crankshaft position sensor, wiring issues |
| P0336 | Crankshaft Position Sensor A Circuit Range/Performance | Faulty crankshaft position sensor, timing issues, wiring problems |
| P0337 | Crankshaft Position Sensor A Circuit Low Input | Faulty crankshaft position sensor, wiring problems |
| P0338 | Crankshaft Position Sensor A Circuit High Input | Faulty crankshaft position sensor, wiring issues |
| P0340 | Camshaft Position Sensor A Circuit Malfunction (Bank 1 or Single Sensor) | Faulty camshaft position sensor, wiring issues, timing issues |
| P0341 | Camshaft Position Sensor A Circuit Range/Performance (Bank 1 or Single Sensor) | Faulty camshaft position sensor, timing issues, wiring problems |
| P0342 | Camshaft Position Sensor A Circuit Low Input (Bank 1 or Single Sensor) | Faulty camshaft position sensor, wiring problems |
| P0343 | Camshaft Position Sensor A Circuit High Input (Bank 1 or Single Sensor) | Faulty camshaft position sensor, wiring issues |
2.4. P0400 – P0499: Exhaust System
These codes relate to issues with the exhaust system, including EGR and catalytic converter problems.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0400 | Exhaust Gas Recirculation Flow Malfunction | Faulty EGR valve, clogged EGR passages, vacuum leaks, faulty EGR sensor |
| P0401 | Exhaust Gas Recirculation Flow Insufficient Detected | Faulty EGR valve, clogged EGR passages, vacuum leaks, faulty EGR sensor |
| P0402 | Exhaust Gas Recirculation Flow Excessive Detected | Faulty EGR valve, vacuum leaks, faulty EGR sensor |
| P0403 | Exhaust Gas Recirculation Circuit Malfunction | Faulty EGR valve, wiring issues |
| P0404 | Exhaust Gas Recirculation Circuit Range/Performance | Faulty EGR valve, wiring issues |
| P0405 | Exhaust Gas Recirculation Sensor A Circuit Low | Faulty EGR sensor, wiring problems |
| P0406 | Exhaust Gas Recirculation Sensor A Circuit High | Faulty EGR sensor, wiring issues |
| P0410 | Secondary Air Injection System Malfunction | Faulty air pump, vacuum leaks, faulty check valve, wiring issues |
| P0411 | Secondary Air Injection System Incorrect Flow Detected | Faulty air pump, vacuum leaks, faulty check valve, wiring issues |
| P0420 | Catalyst System Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, exhaust leaks, faulty O2 sensors, engine problems |
| P0421 | Warm Up Catalyst Efficiency Below Threshold (Bank 1) | Faulty catalytic converter, exhaust leaks, faulty O2 sensors, engine problems |
| P0430 | Catalyst System Efficiency Below Threshold (Bank 2) | Faulty catalytic converter, exhaust leaks, faulty O2 sensors, engine problems |
| P0431 | Warm Up Catalyst Efficiency Below Threshold (Bank 2) | Faulty catalytic converter, exhaust leaks, faulty O2 sensors, engine problems |
| P0440 | Evaporative Emission Control System Malfunction | Vacuum leaks, faulty gas cap, faulty purge valve, faulty vent valve, faulty leak detection pump |
| P0441 | Evaporative Emission Control System Incorrect Purge Flow | Vacuum leaks, faulty purge valve, faulty vent valve, faulty leak detection pump, clogged EVAP lines |
| P0442 | Evaporative Emission Control System Leak Detected (Small Leak) | Vacuum leaks, faulty gas cap, faulty purge valve, faulty vent valve, faulty leak detection pump, cracked EVAP lines |
| P0446 | Evaporative Emission Control System Vent Control Circuit Malfunction | Faulty vent valve, wiring issues, clogged vent lines |
| P0455 | Evaporative Emission Control System Leak Detected (Gross Leak) | Vacuum leaks, missing or faulty gas cap, faulty purge valve, faulty vent valve, faulty leak detection pump, cracked EVAP lines |
| P0456 | Evaporative Emission Control System Leak Detected (Very Small Leak) | Vacuum leaks, faulty gas cap, faulty purge valve, faulty vent valve, faulty leak detection pump, cracked EVAP lines |
| P0457 | Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off) | Loose or faulty gas cap |
| P0460 | Fuel Level Sensor Circuit Malfunction | Faulty fuel level sensor, wiring issues |
| P0461 | Fuel Level Sensor Circuit Range/Performance | Faulty fuel level sensor, wiring issues |
| P0462 | Fuel Level Sensor Circuit Low Input | Faulty fuel level sensor, wiring problems |
| P0463 | Fuel Level Sensor Circuit High Input | Faulty fuel level sensor, wiring issues |
2.5. P0500 – P0599: Vehicle Speed and Idle Control
These codes relate to vehicle speed sensors and idle control systems.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0500 | Vehicle Speed Sensor Malfunction | Faulty VSS, wiring issues, ECM problems |
| P0501 | Vehicle Speed Sensor Range/Performance | Faulty VSS, wiring issues, ECM problems |
| P0502 | Vehicle Speed Sensor Low Input | Faulty VSS, wiring problems |
| P0503 | Vehicle Speed Sensor Intermittent/Erratic/High | Faulty VSS, wiring issues |
| P0505 | Idle Control System Malfunction | Faulty IAC valve, vacuum leaks, throttle body issues, wiring problems |
| P0506 | Idle Control System RPM Lower Than Expected | Vacuum leaks, throttle body issues, faulty IAC valve, carbon buildup |
| P0507 | Idle Control System RPM Higher Than Expected | Vacuum leaks, throttle body issues, faulty IAC valve, wiring problems |
| P0520 | Engine Oil Pressure Sensor/Switch Circuit Malfunction | Faulty oil pressure sensor, wiring issues |
| P0521 | Engine Oil Pressure Sensor/Switch Circuit Range/Performance | Faulty oil pressure sensor, wiring issues |
| P0522 | Engine Oil Pressure Sensor/Switch Circuit Low Voltage | Faulty oil pressure sensor, wiring problems, low oil pressure |
| P0523 | Engine Oil Pressure Sensor/Switch Circuit High Voltage | Faulty oil pressure sensor, wiring issues |
| P0530 | A/C Refrigerant Pressure Sensor Circuit Malfunction | Faulty refrigerant pressure sensor, wiring issues |
| P0531 | A/C Refrigerant Pressure Sensor Circuit Range/Performance | Faulty refrigerant pressure sensor, wiring issues |
| P0532 | A/C Refrigerant Pressure Sensor Circuit Low Input | Faulty refrigerant pressure sensor, wiring problems, low refrigerant level |
| P0533 | A/C Refrigerant Pressure Sensor Circuit High Input | Faulty refrigerant pressure sensor, wiring issues, high refrigerant level |
| P0550 | Power Steering Pressure Sensor Circuit Malfunction | Faulty power steering pressure sensor, wiring issues |
| P0551 | Power Steering Pressure Sensor Circuit Range/Performance | Faulty power steering pressure sensor, wiring issues |
| P0552 | Power Steering Pressure Sensor Circuit Low Input | Faulty power steering pressure sensor, wiring problems |
| P0553 | Power Steering Pressure Sensor Circuit High Input | Faulty power steering pressure sensor, wiring issues |
2.6. P0600 – P0699: Computer and Output Circuit
These codes relate to the vehicle’s computer and output circuits.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0600 | Serial Communication Link Malfunction | Wiring issues, faulty ECM, CAN bus problems |
| P0601 | Internal Control Module Memory Check Sum Error | Faulty ECM |
| P0602 | Control Module Programming Error | Faulty ECM, programming issues |
| P0603 | Internal Control Module Keep Alive Memory (KAM) Error | Faulty ECM |
| P0604 | Internal Control Module Random Access Memory (RAM) Error | Faulty ECM |
| P0605 | Internal Control Module Read Only Memory (ROM) Error | Faulty ECM |
| P0606 | PCM Processor Fault | Faulty ECM |
| P0620 | Generator Control Circuit Malfunction | Faulty alternator, wiring issues, ECM problems |
| P0621 | Generator Lamp “L” Control Circuit Malfunction | Faulty alternator, wiring issues, ECM problems |
| P0622 | Generator Field “F” Control Circuit Malfunction | Faulty alternator, wiring issues, ECM problems |
| P0650 | Malfunction Indicator Lamp (MIL) Control Circuit Malfunction | Wiring issues, faulty MIL, ECM problems |
2.7. P0700 – P0799: Transmission
These codes relate to transmission issues.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0700 | Transmission Control System Malfunction | Faulty TCM, wiring issues, transmission problems |
| P0701 | Transmission Control System Range/Performance | Faulty TCM, wiring issues, transmission problems |
| P0702 | Transmission Control System Electrical | Wiring issues, faulty solenoids, TCM problems |
| P0703 | Torque Converter/Brake Switch B Circuit Malfunction | Faulty brake switch, wiring issues |
| P0704 | Clutch Switch Input Circuit Malfunction | Faulty clutch switch, wiring issues |
| P0705 | Transmission Range Sensor Circuit Malfunction (PRNDL Input) | Faulty transmission range sensor, wiring issues |
| P0706 | Transmission Range Sensor Circuit Range/Performance | Faulty transmission range sensor, wiring issues |
| P0707 | Transmission Range Sensor Circuit Low Input | Faulty transmission range sensor, wiring problems |
| P0708 | Transmission Range Sensor Circuit High Input | Faulty transmission range sensor, wiring issues |
| P0709 | Transmission Range Sensor Circuit Intermittent | Faulty transmission range sensor, wiring issues |
| P0710 | Transmission Fluid Temperature Sensor Circuit Malfunction | Faulty TFT sensor, wiring issues |
| P0711 | Transmission Fluid Temperature Sensor Circuit Range/Performance | Faulty TFT sensor, wiring issues |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low Input | Faulty TFT sensor, wiring problems |
| P0713 | Transmission Fluid Temperature Sensor Circuit High Input | Faulty TFT sensor, wiring issues |
| P0714 | Transmission Fluid Temperature Sensor Circuit Intermittent | Faulty TFT sensor, wiring issues |
| P0715 | Input/Turbine Speed Sensor Circuit Malfunction | Faulty input/turbine speed sensor, wiring issues |
| P0716 | Input/Turbine Speed Sensor Circuit Range/Performance | Faulty input/turbine speed sensor, wiring issues |
| P0717 | Input/Turbine Speed Sensor Circuit No Signal | Faulty input/turbine speed sensor, wiring issues |
| P0718 | Input/Turbine Speed Sensor Circuit Intermittent | Faulty input/turbine speed sensor, wiring issues |
| P0720 | Output Speed Sensor Circuit Malfunction | Faulty output speed sensor, wiring issues |
| P0721 | Output Speed Sensor Range/Performance | Faulty output speed sensor, wiring issues |
| P0722 | Output Speed Sensor No Signal | Faulty output speed sensor, wiring issues |
| P0723 | Output Speed Sensor Intermittent | Faulty output speed sensor, wiring issues |
| P0730 | Incorrect Gear Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0731 | Gear 1 Incorrect Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0732 | Gear 2 Incorrect Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0733 | Gear 3 Incorrect Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0734 | Gear 4 Incorrect Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0735 | Gear 5 Incorrect Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
| P0736 | Reverse Incorrect Gear Ratio | Transmission problems, faulty solenoids, low fluid level, damaged gears |
2.8. P0800 – P0899: Transmission Control System
These codes relate to transmission control systems, including shift solenoids and clutch issues.
| Code | Meaning | Possible Causes |
|---|---|---|
| P0801 | Reverse Inhibit Control Circuit Malfunction | Wiring issues, faulty solenoid |
| P0803 | 1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction | Wiring issues, faulty solenoid |
| P0804 | 1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction | Wiring issues, faulty bulb |
| P0805 | Clutch Position Sensor Circuit Malfunction | Faulty sensor, wiring issues |
| P0806 | Clutch Position Sensor Circuit Range/Performance | Faulty sensor, wiring issues |
| P0807 | Clutch Position Sensor Circuit Low | Faulty sensor, wiring problems |
| P0808 | Clutch Position Sensor Circuit High | Faulty sensor, wiring issues |
| P0810 | Clutch Position Control Error | Faulty sensor, wiring issues, TCM problems |
| P0811 | Excessive Clutch Slippage | Clutch wear, faulty clutch, TCM problems |
| P0812 | Reverse Input Circuit Malfunction | Wiring issues, faulty switch |
| P0813 | Reverse Output Circuit Malfunction | Wiring issues, faulty relay |
| P0815 | Upshift Switch Circuit Malfunction | Wiring issues, faulty switch |
| P0816 | Downshift Switch Circuit Malfunction | Wiring issues, faulty switch |
| P0820 | Gear Lever X-Y Sensor Circuit | Faulty sensor, wiring issues |
| P0830 | Clutch Pedal Switch A Circuit Malfunction | Faulty switch, wiring issues |
| P0831 | Clutch Pedal Switch A Circuit Low | Faulty switch, wiring problems |
| P0832 | Clutch Pedal Switch A Circuit High | Faulty switch, wiring issues |
| P0833 | Clutch Pedal Switch B Circuit Malfunction | Faulty switch, wiring issues |
| P0834 | Clutch Pedal Switch B Circuit Low | Faulty switch, wiring problems |
| P0835 | Clutch Pedal Switch B Circuit High | Faulty switch, wiring issues |
| P0840 | Transmission Fluid Pressure Sensor/Switch A Circuit Malfunction | Faulty sensor, wiring issues |
| P0841 | Transmission Fluid Pressure Sensor/Switch A Circuit Range/Performance | Faulty sensor, wiring issues |
| P0842 | Transmission Fluid Pressure Sensor/Switch A Circuit Low | Faulty sensor, wiring problems |
| P0843 | Transmission Fluid Pressure Sensor/Switch A Circuit High | Faulty sensor, wiring issues |
| P0845 | Transmission Fluid Pressure Sensor/Switch B Circuit Malfunction | Faulty sensor, wiring issues |
| P0846 | Transmission Fluid Pressure Sensor/Switch B Circuit Range/Performance | Faulty sensor, wiring issues |
| P0847 | Transmission Fluid Pressure Sensor/Switch B Circuit Low | Faulty sensor, wiring problems |
| P0848 | Transmission Fluid Pressure Sensor/Switch B Circuit High | Faulty sensor, wiring issues |
2.9. P1000 – P2999: Manufacturer Specific Codes
These are manufacturer-specific codes, which can vary widely. For Mercedes-Benz trucks, they often relate to unique systems and components.
| Code | Meaning | Possible Causes |
|---|---|---|
| P1000 | Electronic Gear Selector Module: Defective N15/5 | Faulty gear selector module, wiring issues |
| P1228 | (1997 C 220 CDI) Yet unknown code | Requires further diagnostics |
| P1386 | Knock control | Faulty knock sensor, wiring issues |
| P1570 | Intermittent No-Start Immobilizer Module | Faulty immobilizer module, key issues, wiring problems |
| P1747 | Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1 (instrument cluster) | CAN bus issues, faulty gear selector module, instrument cluster problems |
| P1750 | Electronic Gear Selector Module: Very low control unit supply voltage | Low voltage, wiring issues, faulty gear selector module |
| P1832 | Electronic Gear Selector Module: SHORT in circuit N15/5 output stage | Short circuit, wiring issues, faulty gear selector module |
| P1910 | Electronic Gear Selector Module: Control Unit over voltage | Over voltage, wiring issues, faulty gear selector module |
| P1912 | Electronic Gear Selector Module: Weak touch push button voltage | Faulty push button, wiring issues, gear selector module problems |
| P2000 | NOx Trap Efficiency Below Threshold (Bank 1) | Faulty NOx trap, exhaust leaks, faulty O2 sensors |
| P2001 | NOx Trap Efficiency Below Threshold (Bank 2) | Faulty NOx trap, exhaust leaks, faulty O2 sensors |
| P2003 | Particulate Trap Efficiency Below Threshold (Bank 1) | Faulty particulate trap, exhaust leaks, faulty sensors |
| P2004 | Particulate Trap Efficiency Below Threshold (Bank 2) | Faulty particulate trap, exhaust leaks, faulty sensors |
| P2031 | Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2) | Faulty exhaust gas temperature sensor, wiring issues |
| P2032 | Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2) | Faulty exhaust gas temperature sensor, wiring problems |
| P2033 | Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2) |