What does code P2049 mean?

Q: What does code P2049 mean?

Reductant Injector Circuit High (Bank 1 Unit 1). P2049 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the reductant injector control circuit for bank 1 unit 1, which is part of the diesel exhaust fluid (DEF) injection system. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, typically indicating a short to power, an open circuit, or a faulty injector.

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2049

P2049Reductant Injector Circuit High (Bank 1 Unit 1)

P2049 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the reductant injector control circuit for bank 1 unit 1, which is part of the diesel exhaust fluid (DEF) injection system. The PCM monitors the circuit and sets this code when the voltage exceeds the expected range, typically indicating a short to power, an open circuit, or a faulty injector.

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.