P20FA
Reductant Pump B Control Circuit/Open
P20FA is an OBD-II diagnostic trouble code meaning: Reductant Pump B Control Circuit/Open. Common causes: open or short circuit in the pump control circuit, pump control relay malfunction. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- SCR system error message (AdBlue)
- Reduced engine power
- Increased fuel consumption
- Ammonia smell from exhaust system
Causes
- Open or short circuit in the pump control circuit
- Pump control relay malfunction
- Wiring harness damage
- Reagent pump failure
- Problems with the engine control unit
How to Fix
- Check the integrity of the wiring and connectors of the control circuit
- Check the functionality of the pump relay
- Test the resistance of the pump winding
- Check power and ground in the control circuit
- If necessary, replace the reagent pump
Related codes
Error P20FA by Vehicle Brand
FAQ
What does the P20FA code mean?
P20FA is an OBD-II diagnostic trouble code that indicates: Reductant Pump B Control Circuit/Open
What causes a P20FA error code?
The most common causes of P20FA include: Open or short circuit in the pump control circuit; Pump control relay malfunction; Wiring harness damage; Reagent pump failure.
How do I fix a P20FA diagnostic trouble code?
To fix P20FA: Check the integrity of the wiring and connectors of the control circuit. Check the functionality of the pump relay. Test the resistance of the pump winding. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20FA?
Yes, but get it checked soon
How much does it cost to fix P20FA?
The estimated repair cost for P20FA is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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