P20FC – BMW DTC

BMW DTC P20FC – Reductant Pump ‘B’ Control Circuit Low

DTC P20FC meaning on BMW

DTC P20FC on a BMW indicates an issue with the Reductant Pump ‘B’ Control Circuit being detected as low. The reductant pump is responsible for supplying the Diesel Exhaust Fluid (DEF) to the Selective Catalytic Reduction (SCR) system for emissions control.

BMW DTC P20FC symptoms

Symptoms of DTC P20FC on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Possible DEF system warning message

BMW DTC P20FC causes

Common causes of DTC P20FC on a BMW include:

• Defective reductant pump ‘B’
• Wiring or connector issues in the control circuit
• Faulty SCR system components

BMW DTC P20FC seriousness

DTC P20FC should be addressed promptly as it can lead to increased emissions and potential damage to the SCR system. Ignoring this fault may result in the vehicle failing emissions tests and reduced fuel efficiency.

How to diagnose DTC P20FC on BMW

To diagnose DTC P20FC on a BMW, you can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the reductant pump ‘B’ for any visible damage
3. Check the wiring and connectors for any signs of wear or corrosion
4. Test the control circuit for continuity and proper voltage

How to fix DTC P20FC on BMW

To fix DTC P20FC on a BMW, you may need to:

1. Replace the defective reductant pump ‘B’
2. Repair or replace any damaged wiring or connectors in the control circuit
3. Address any faults in the SCR system components

How to erase DTC P20FC on BMW

To erase DTC P20FC on a BMW, you can:

1. Use a diagnostic scanner to clear the fault codes
2. After fixing the underlying issue, drive the vehicle to allow the system to retest and verify the repair

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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