P20A1

DTC P20A1, sometimes indicated as P20A100 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 performance.

Reductant purge control valve performance means that the reductant purge control valve is not performing as intended. This may be due to a number of factors, including a clogged valve, a defective valve, or a lack of reductant in the system.
To correct this issue, first check to make sure that the reductant purge control valve is not clogged. If it is, clean it or replace it as necessary. If the valve is not clogged, then check the reductant level in the system and add more if necessary.

• P20A1: Reductant Purge Control Valve Performance
• P20A1: Reductant purge control valve – performance problem
• P20A1 00: Reductant purge control valve - performance problem