What does code P24B6 mean?

Q: What does code P24B6 mean?

Particulate Matter Sensor Heater Control Circuit High. P24B6 means the engine control module (ECM) has detected an abnormally high voltage on the heater control circuit for the particulate matter (PM) sensor, which is used on diesel and some gasoline direct-injection vehicles to monitor soot levels in the exhaust. The ECM commands the heater on to bring the sensor up to operating temperature, but the feedback circuit reports voltage above the expected range, so the ECM sets this code and may disable the heater or the sensor's active monitoring.

DTC codes / P24xx · Auxiliary emission controls / P24B6

P24B6Particulate Matter Sensor Heater Control Circuit High

P24B6 means the engine control module (ECM) has detected an abnormally high voltage on the heater control circuit for the particulate matter (PM) sensor, which is used on diesel and some gasoline direct-injection vehicles to monitor soot levels in the exhaust. The ECM commands the heater on to bring the sensor up to operating temperature, but the feedback circuit reports voltage above the expected range, so the ECM sets this code and may disable the heater or the sensor's active monitoring.

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.