P20A6
Reductant Injection Air Pressure Control Valve Circuit/Open
P20A6 is an OBD-II diagnostic trouble code meaning: Reductant Injection Air Pressure Control Valve Circuit/Open. Common causes: open or short circuit in valve circuit, pressure control solenoid valve malfunction. Estimated repair cost: $28–89.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Increased urea consumption
- A message indicating a malfunction of the exhaust cleaning system appears
- Increased NOx emissions
Causes
- Open or short circuit in valve circuit
- Pressure control solenoid valve malfunction
- Problems with wiring harness or contacts
- SCR control unit malfunction
- Mechanical damage to air lines
How to Fix
- Check the integrity of the valve wiring and connectors
- Test valve resistance (usually 10-20 ohms)
- Check the voltage supply to the valve when the ignition is turned on
- Inspect air lines for damage
- If necessary, replace the air pressure control valve
Related codes
Error P20A6 by Vehicle Brand
FAQ
What does the P20A6 code mean?
P20A6 is an OBD-II diagnostic trouble code that indicates: Reductant Injection Air Pressure Control Valve Circuit/Open
What causes a P20A6 error code?
The most common causes of P20A6 include: Open or short circuit in valve circuit; Pressure control solenoid valve malfunction; Problems with wiring harness or contacts; SCR control unit malfunction.
How do I fix a P20A6 diagnostic trouble code?
To fix P20A6: Check the integrity of the valve wiring and connectors. Test valve resistance (usually 10-20 ohms). Check the voltage supply to the valve when the ignition is turned on. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P20A6?
Yes, but get it checked soon
How much does it cost to fix P20A6?
The estimated repair cost for P20A6 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat