P20AB
Reductant Injection Air Pressure Control Valve Stuck Closed
P20AB is an OBD-II diagnostic trouble code meaning: Reductant Injection Air Pressure Control Valve Stuck Closed. Common causes: mechanical valve jamming, valve deposit accumulation. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Increased NOx emissions
- SCR system error message on dashboard
Causes
- Mechanical valve jamming
- Valve deposit accumulation
- Valve wiring problems
- Control relay malfunction
- Control unit software error
How to Fix
- Check the condition of the valve and its electrical connections
- Clean the valve from deposits
- Check the operation of the control relay
- Replace faulty valve if necessary
- Reset the error and check the system operation
Related codes
Error P20AB by Vehicle Brand
FAQ
What does the P20AB code mean?
P20AB is an OBD-II diagnostic trouble code that indicates: Reductant Injection Air Pressure Control Valve Stuck Closed
What causes a P20AB error code?
The most common causes of P20AB include: Mechanical valve jamming; Valve deposit accumulation; Valve wiring problems; Control relay malfunction.
How do I fix a P20AB diagnostic trouble code?
To fix P20AB: Check the condition of the valve and its electrical connections. Clean the valve from deposits. Check the operation of the control relay. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20AB?
Yes, but get it checked soon
How much does it cost to fix P20AB?
The estimated repair cost for P20AB is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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