P20FD – BMW DTC

BMW DTC P20FD – Reductant Pump ‘B’ Control Circuit High

DTC P20FD meaning on BMW

DTC P20FD on a BMW indicates an issue with the Reductant Pump ‘B’ Control Circuit High. This fault code is related to the system that controls the reductant pump, which is responsible for supplying the necessary fluid for the selective catalytic reduction (SCR) system to reduce harmful emissions.

BMW DTC P20FD symptoms

Symptoms of DTC P20FD on a BMW may include:

• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Difficulty starting the vehicle

BMW DTC P20FD causes

Common causes of DTC P20FD on a BMW include:

• Faulty reductant pump ‘B’
• Wiring or connector issues in the control circuit
• Software glitches in the engine control module (ECM)

BMW DTC P20FD seriousness

DTC P20FD should not be ignored as it can lead to increased emissions and potential damage to the catalytic converter. It is important to address this issue promptly to ensure the vehicle meets emission standards and operates efficiently.

How to diagnose DTC P20FD on BMW

To diagnose DTC P20FD on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code and related data
2. Inspect the reductant pump ‘B’ and its wiring for any visible damage
3. Check the control circuit for proper voltage and continuity
4. Perform a system test to verify the functionality of the reductant pump

How to fix DTC P20FD on BMW

To fix DTC P20FD on a BMW, the following steps may be taken:

1. Replace the faulty reductant pump ‘B’ if necessary
2. Repair any damaged wiring or connectors in the control circuit
3. Update the ECM software to address any glitches
4. Clear the fault code and perform a test drive to ensure the issue is resolved

How to erase DTC P20FD on BMW

To erase DTC P20FD on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault code
2. Perform a test drive to confirm the code does not return
3. If the code reappears, further diagnosis and repairs may be necessary

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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