P20A0

DTC P20A0, sometimes indicated as P20A000 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 /open.

This code is caused by a problem with the reductant purge control valve circuit. This valve helps to purge any excess reductant from the system. If this valve is not working properly, it can cause this code to be thrown.
The best way to fix this code is to replace the purge control valve. If you are not comfortable doing this yourself, you can take the vehicle to a mechanic to have them fix it.

• P20A0: Reductant Purge Control Valve Circuit /Open
• P20A0: Reductant purge control valve – open circuit
• P20A0 00: Reductant purge control valve - open circuit