Most common AdBlue-related fault codes for Peugeot vehicles
1. P20E8 - Reductant Pressure Too Low
Description: This code is triggered when the pressure in the AdBlue system is too low. It could indicate a problem with the AdBlue pump, injector, or a leak in the system.
- Common Causes: Faulty AdBlue pump, clogged injector, or AdBlue system leak.
2. P204F - Reductant System Performance
Description: Indicates an issue with the overall performance of the AdBlue system. This could be caused by contaminated AdBlue fluid, a blocked injector, or a system malfunction.
- Common Causes: Incorrect or contaminated AdBlue fluid, faulty injector, or system malfunction.
3. P20EE - NOx Catalyst Efficiency Below Threshold
Description: This code points to a problem with the Selective Catalytic Reduction (SCR) system, specifically the NOx catalyst. It usually happens when the system is not reducing NOx emissions as expected.
- Common Causes: Faulty NOx sensor, degraded SCR catalyst, or incorrect AdBlue dosage.
4. P2200 - NOx Sensor Circuit Bank 1
Description: This code indicates an issue with the NOx sensor on Bank 1. The sensor may not be sending the correct signals or could be malfunctioning.
- Common Causes: Faulty NOx sensor, wiring issues, or problems with the sensor's communication to the ECU.
5. P229F - NOx Sensor Signal Stuck
Description: This fault code occurs when the signal from the NOx sensor gets stuck, indicating that the sensor isn't providing accurate data to the engine management system.
- Common Causes: Faulty NOx sensor or wiring issues.
6. P20BA - Reductant Heater Control Circuit Open
Description: The reductant (AdBlue) heater control circuit is malfunctioning, which means the system may not be able to properly heat the AdBlue fluid in cold conditions.
- Common Causes: Faulty AdBlue heater or wiring issues.
7. P20B9 - Reductant Heater A Control Performance
Description: This code is related to the AdBlue tank heater. In cold weather, the heater prevents the AdBlue from freezing. A malfunction can cause this fault.
- Common Causes: Faulty heater, wiring issues, or damaged control circuit.
8. P2047 - Reductant Injector Circuit Low
Description: This code indicates a problem with the AdBlue injector circuit, where the injector is not receiving the correct signal or power.
- Common Causes: Faulty AdBlue injector, wiring problems, or ECU-related issues.
9. P204C - Reductant Tank Sensor Circuit Low
Description: This fault relates to the AdBlue tank sensor, which is responsible for monitoring the level and quality of the AdBlue in the tank.
- Common Causes: Faulty sensor, wiring issues, or low AdBlue fluid levels.
10. P2413 - Exhaust Gas Recirculation (EGR) System Performance
Description: Although not directly related to the AdBlue system, this code can often appear in conjunction with AdBlue issues because of how the two systems interact to manage emissions.
- Common Causes: Faulty EGR valve, build-up of carbon in the EGR system, or a sensor issue.
These codes usually require diagnostic tools to properly identify and fix the root cause. Issues like faulty sensors, blocked injectors, or system leaks are common culprits and should be addressed promptly to avoid potential damage to the SCR system or other emissions-related components.
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