What does code P24C9 mean?

Q: What does code P24C9 mean?

Particulate Matter Sensor Temperature Circuit High. P24C9 indicates that the powertrain control module has detected an abnormally high voltage on the temperature sensing circuit of the particulate matter sensor, which is used to monitor soot levels in the exhaust of diesel and gasoline direct-injection engines. The sensor's internal thermistor or its wiring is reporting a temperature signal that exceeds the plausible range, so the PCM sets this code and may disable particulate filter regeneration strategies.

DTC codes / P24xx · Auxiliary emission controls / P24C9

P24C9Particulate Matter Sensor Temperature Circuit High

P24C9 indicates that the powertrain control module has detected an abnormally high voltage on the temperature sensing circuit of the particulate matter sensor, which is used to monitor soot levels in the exhaust of diesel and gasoline direct-injection engines. The sensor's internal thermistor or its wiring is reporting a temperature signal that exceeds the plausible range, so the PCM sets this code and may disable particulate filter regeneration strategies.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

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.