What does code P20F6 mean?

Q: What does code P20F6 mean?

Reductant Injection Valve Stuck Open (Bank 1 Unit 1). P20F6 indicates that the powertrain control module has detected a fault in the reductant injection valve for bank 1 unit 1, specifically that the valve is stuck open. The computer monitors the valve's electrical circuit and the resulting pressure or flow changes, and it sets this code when the valve remains open when commanded closed or fails to seal properly.

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P20F6

P20F6Reductant Injection Valve Stuck Open (Bank 1 Unit 1)

P20F6 indicates that the powertrain control module has detected a fault in the reductant injection valve for bank 1 unit 1, specifically that the valve is stuck open. The computer monitors the valve's electrical circuit and the resulting pressure or flow changes, and it sets this code when the valve remains open when commanded closed or fails to seal properly.

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.