What does code P24B7 mean?

Q: What does code P24B7 mean?

Particulate Matter Sensor Heater Resistance. P24B7 indicates that the engine control module has detected an abnormal electrical condition in the heater circuit of the particulate matter sensor, which is used on diesel and gasoline direct-injection vehicles to monitor soot levels in the exhaust. The computer compares the heater's current draw or voltage response to expected values and sets this code when the circuit resistance falls outside the manufacturer's specified range.

DTC codes / P24xx · Auxiliary emission controls / P24B7

P24B7Particulate Matter Sensor Heater Resistance

P24B7 indicates that the engine control module has detected an abnormal electrical condition in the heater circuit of the particulate matter sensor, which is used on diesel and gasoline direct-injection vehicles to monitor soot levels in the exhaust. The computer compares the heater's current draw or voltage response to expected values and sets this code when the circuit resistance falls outside the manufacturer's specified range.

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.