P20A8
Reductant Injection Air Pressure Control Valve Circuit Low
P20A8 is an OBD-II diagnostic trouble code meaning: Reductant Injection Air Pressure Control Valve Circuit Low. Common causes: air pressure control valve malfunction, open or short circuit in control circuit. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Increased fuel consumption
- Unpleasant exhaust smell
- Possible transition to emergency mode
Causes
- Air pressure control valve malfunction
- Open or short circuit in control circuit
- Poor contact in connectors
- SCR control unit malfunction
- Wiring Harness Problems
How to Fix
- Check valve control circuit integrity
- Check valve resistance and operation
- Inspect connectors and contacts for corrosion
- Check voltage at valve connector
- If necessary, replace the air pressure control valve
Related codes
Error P20A8 by Vehicle Brand
FAQ
What does the P20A8 code mean?
P20A8 is an OBD-II diagnostic trouble code that indicates: Reductant Injection Air Pressure Control Valve Circuit Low
What causes a P20A8 error code?
The most common causes of P20A8 include: Air pressure control valve malfunction; Open or short circuit in control circuit; Poor contact in connectors; SCR control unit malfunction.
How do I fix a P20A8 diagnostic trouble code?
To fix P20A8: Check valve control circuit integrity. Check valve resistance and operation. Inspect connectors and contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20A8?
Yes, but get it checked soon
How much does it cost to fix P20A8?
The estimated repair cost for P20A8 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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