What does code P20A2 mean?

Q: What does code P20A2 mean?

Reductant Purge Control Valve A Circuit Low. P20A2 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the reductant purge control valve 'A', which is part of the diesel exhaust fluid (DEF) system. The PCM expects a certain voltage on the valve's control circuit when commanding it on or off, and a reading below the acceptable threshold triggers this code.

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P20A2

P20A2Reductant Purge Control Valve A Circuit Low

P20A2 indicates that the powertrain control module (PCM) has detected a low-voltage condition on the control circuit for the reductant purge control valve 'A', which is part of the diesel exhaust fluid (DEF) system. The PCM expects a certain voltage on the valve's control circuit when commanding it on or off, and a reading below the acceptable threshold triggers this code.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.