Ford Transits Most Common AdBlue-Related Fault Codes
1. P20E8 - Reductant Pressure Too Low
Description: This code indicates that the pressure in the AdBlue system is below the required threshold.
- Common Causes: Faulty AdBlue pump, clogged injector, or leaks in the AdBlue system.
2. P207F - Reductant Quality Performance
Description: This code is triggered when the quality of the AdBlue fluid is not within the acceptable range. The system may detect contaminated or incorrect fluid.
- Common Causes: Contaminated AdBlue, improper AdBlue fluid, or faulty NOx sensor.
3. P204F - Reductant System Performance
Description: Indicates that the overall performance of the AdBlue system is below the expected standard. This could point to various issues, including dosing problems or contamination.
- Common Causes: Blocked AdBlue injector, contaminated AdBlue, or issues with the dosing control module.
4. P20EE - SCR NOx Catalyst Efficiency Below Threshold
Description: This code indicates that the SCR system is not reducing nitrogen oxides (NOx) emissions as effectively as it should.
- Common Causes: Faulty NOx sensor, degraded SCR catalyst, or incorrect AdBlue dosage.
5. P229F - NOx Sensor Signal Stuck
Description: The signal from the NOx sensor is stuck or not changing as expected. This can affect the SCR system’s ability to manage emissions.
- Common Causes: Faulty NOx sensor or wiring issues.
6. P20BD - Reductant Heater A Control Circuit Performance
Description: This code relates to the AdBlue heater circuit, which is essential for preventing the fluid from freezing in cold conditions.
- Common Causes: Faulty AdBlue heater, wiring issues, or heater control circuit malfunction.
7. P20BA - Reductant Heater Control Circuit Open
Description: Indicates an open circuit in the AdBlue heater control, which could lead to issues with heating the AdBlue fluid in colder temperatures.
- Common Causes: Faulty heater, wiring or connector issues.
8. P2047 - Reductant Injector Circuit Low
Description: This code signifies a low signal or voltage issue with the AdBlue injector.
- Common Causes: Faulty AdBlue injector, wiring issues, or a problem with the dosing control module.
9. P204C - Reductant Tank Sensor Circuit Low
Description: This code indicates that there is an issue with the AdBlue tank sensor circuit, which could be monitoring the level or quality of the AdBlue fluid.
- Common Causes: Faulty sensor, low AdBlue level, or wiring issues.
10. P20B9 - Reductant Heater B Control Circuit Performance
Description: Similar to P20BD but related to a different heater circuit. This code indicates an issue with the performance of one of the AdBlue system’s heaters.
- Common Causes: Faulty heater, control circuit malfunction, or wiring issue.
11. P21AB - Reductant Level Sensor Circuit Intermittent/Erratic
Description: This code appears when the reductant (AdBlue) level sensor is providing erratic or intermittent signals to the ECU.
- Common Causes: Faulty level sensor, wiring problems, or low fluid levels.
12. P2413 - Exhaust Gas Recirculation (EGR) System Performance
Description: Though primarily related to the EGR system, this code can sometimes appear alongside AdBlue faults, as both systems work together to manage emissions.
- Common Causes: Faulty EGR valve or related components, carbon build-up, or sensor malfunction.
13. P2033 - Exhaust Gas Temperature Sensor High
Description: The SCR system relies on accurate temperature readings. This code is triggered when the exhaust gas temperature sensor reads too high.
- Common Causes: Faulty temperature sensor, wiring issues, or a problem with the SCR system.
These codes usually require diagnostic tools to determine the exact cause and can often be related to either sensor malfunctions or AdBlue system issues (e.g., fluid contamination, injector faults). Regular maintenance and use of proper AdBlue fluid can help reduce the occurrence of these faults.
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