BMW DTC P20FA – Reductant Pump ‘B’ Control Circuit/Open
DTC P20FA meaning on BMW
The DTC P20FA error code on a BMW indicates an issue with the Reductant Pump ‘B’ Control Circuit being open or malfunctioning. The reductant pump is responsible for supplying the Diesel Exhaust Fluid (DEF) to the Selective Catalytic Reduction (SCR) system to reduce emissions.
BMW DTC P20FA symptoms
Symptoms of the DTC P20FA code on a BMW may include:
- Check Engine Light (MIL) illuminated
- Reduced engine performance
- Increased fuel consumption
- Possible DEF system warning message
BMW DTC P20FA causes
Common causes of the DTC P20FA code on a BMW include:
- Faulty reductant pump ‘B’
- Open or short circuit in the reductant pump control circuit
- Defective wiring or connectors
- Software issues
BMW DTC P20FA seriousness
The DTC P20FA code should not be ignored as it can lead to increased emissions and potential damage to the SCR system. It is recommended to address this issue promptly to ensure proper vehicle operation and compliance with emissions regulations.
How to diagnose DTC P20FA on BMW
To diagnose the DTC P20FA code on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the reductant pump ‘B’ and its control circuit for any visible damage
- Check the wiring and connectors for continuity and proper connection
- Test the reductant pump and control circuit components for proper operation
How to fix DTC P20FA on BMW
To fix the DTC P20FA code on a BMW, the following steps may be taken:
- Replace the faulty reductant pump ‘B’ if necessary
- Repair any open or short circuits in the control circuit
- Repair or replace any damaged wiring or connectors
- Update the software if required
How to erase DTC P20FA on BMW
To erase the DTC P20FA code on a BMW, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset to turn off the Check Engine Light and ensure that the issue has been resolved.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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