What does code P2046 mean?

Q: What does code P2046 mean?

Reductant Temperature Sensor Circuit Intermittent. P2046 indicates that the powertrain control module has detected an intermittent fault in the reductant temperature sensor circuit, which monitors the temperature of the diesel exhaust fluid (DEF) tank or lines. The circuit's signal momentarily drops out or becomes erratic, rather than failing completely, so the computer cannot reliably trust the sensor reading.

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2046

P2046Reductant Temperature Sensor Circuit Intermittent

P2046 indicates that the powertrain control module has detected an intermittent fault in the reductant temperature sensor circuit, which monitors the temperature of the diesel exhaust fluid (DEF) tank or lines. The circuit's signal momentarily drops out or becomes erratic, rather than failing completely, so the computer cannot reliably trust the sensor reading.

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.