P20A3
Reductant Purge Control Valve A Circuit High
P20A3 is an OBD-II diagnostic trouble code meaning: Reductant Purge Control Valve A Circuit High. Common causes: short circuit in valve circuit, reagent purge valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased consumption of AdBlue reagent
- Unpleasant smell from the exhaust system
- Activating emergency engine operation
Causes
- Short circuit in valve circuit
- Reagent purge valve malfunction
- Wiring harness damage
- Problems with the SCR control unit
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of wiring and connectors
- Test the resistance of the reagent purge valve
- Check control circuit voltage
- Replace faulty valve if necessary
- Reset the error and check the system after repair
Related codes
Error P20A3 by Vehicle Brand
FAQ
What does the P20A3 code mean?
P20A3 is an OBD-II diagnostic trouble code that indicates: Reductant Purge Control Valve A Circuit High
What causes a P20A3 error code?
The most common causes of P20A3 include: Short circuit in valve circuit; Reagent purge valve malfunction; Wiring harness damage; Problems with the SCR control unit.
How do I fix a P20A3 diagnostic trouble code?
To fix P20A3: Check the integrity of wiring and connectors. Test the resistance of the reagent purge valve. Check control circuit voltage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20A3?
Yes, but get it checked soon
How much does it cost to fix P20A3?
The estimated repair cost for P20A3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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