What does code P24AF mean?

Q: What does code P24AF mean?

Particulate Matter Sensor Circuit Range or Performance. P24AF indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the particulate matter (PM) sensor circuit, which monitors soot levels in the exhaust stream. The computer compares the sensor's signal against expected values and flags this code when the voltage, current, or response time falls outside the manufacturer's calibrated window.

DTC codes / P24xx · Auxiliary emission controls / P24AF

P24AFParticulate Matter Sensor Circuit Range or Performance

P24AF indicates that the powertrain control module (PCM) has detected an out-of-range or performance fault in the particulate matter (PM) sensor circuit, which monitors soot levels in the exhaust stream. The computer compares the sensor's signal against expected values and flags this code when the voltage, current, or response time falls outside the manufacturer's calibrated window.

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.