BMW DTC P20BC – Reductant Heater ‘A’ Control Circuit High
DTC P20BC meaning on BMW
DTC P20BC on a BMW indicates an issue with the Reductant Heater ‘A’ Control Circuit High. This fault code is related to the heating element that warms the diesel exhaust fluid (DEF) or AdBlue solution in the Selective Catalytic Reduction (SCR) system.
BMW DTC P20BC symptoms
Symptoms of DTC P20BC on a BMW may include the malfunction indicator lamp (MIL) or check engine light illuminating on the dashboard. Additionally, you may notice reduced engine performance or increased emissions.
BMW DTC P20BC causes
The common causes of DTC P20BC on a BMW include a faulty reductant heater ‘A’, damaged wiring or connectors in the control circuit, or a malfunctioning SCR system.
BMW DTC P20BC seriousness
While DTC P20BC may not cause immediate drivability issues, it can lead to increased emissions and potential failure to meet emission standards. It is recommended to address this fault code promptly to ensure proper vehicle operation.
How to diagnose DTC P20BC on BMW
To diagnose DTC P20BC on a BMW, a diagnostic scan tool capable of reading BMW specific fault codes is required. The technician will need to inspect the reductant heater ‘A’, check the wiring and connectors for any damage, and perform tests on the SCR system to identify the root cause of the fault code.
How to fix DTC P20BC on BMW
Fixing DTC P20BC on a BMW may involve replacing the faulty reductant heater ‘A’, repairing any damaged wiring or connectors in the control circuit, or addressing issues within the SCR system. It is recommended to follow manufacturer guidelines and use genuine BMW parts for the repair.
How to erase DTC P20BC on BMW
Once the underlying issue causing DTC P20BC on a BMW has been resolved, the fault code can be cleared using a diagnostic scan tool. By erasing the fault code, the check engine light should turn off, indicating that the issue has been addressed.