What does code P04D1 mean?

Q: What does code P04D1 mean?

EGR Temperature Sensor C Circuit High. P04D1 indicates that the powertrain control module has detected an abnormally high voltage on the signal circuit of the exhaust gas recirculation temperature sensor C, which usually points to an open circuit or a sensor that is reading colder than actual. The computer compares this voltage against expected values and flags the code when the signal stays above the calibrated threshold for a set period.

DTC codes / P04xx · Auxiliary emission controls / P04D1

P04D1EGR Temperature Sensor C Circuit High

P04D1 indicates that the powertrain control module has detected an abnormally high voltage on the signal circuit of the exhaust gas recirculation temperature sensor C, which usually points to an open circuit or a sensor that is reading colder than actual. The computer compares this voltage against expected values and flags the code when the signal stays above the calibrated threshold for a set period.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaAuxiliary 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.