P20A3

DTC P20A3, sometimes indicated as P20A300 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant purge control valve circuit high.

This code is set when the reductant purge control valve circuit is high. This can be caused by a number of things, including a bad purge control valve, a bad solenoid, a shorted or open purge control valve circuit, or a bad PCM.
If you have a bad purge control valve, you will need to replace it. If you have a bad solenoid, you will need to replace it. If you have a shorted or open purge control valve circuit, you will need to fix the problem. If you have a bad PCM, you will need to replace it.

• P20A3: Reductant Purge Control Valve Circuit High
• P20A3: Reductant purge control valve – circuit high
• P20A3 00: Reductant purge control valve - circuit high