DTC codes / P24xx · Auxiliary emission controls / P24FC
P24FC indicates that the powertrain control module (PCM) has detected an excessively high current or temperature in the heater control circuit for the particulate matter (PM) sensor. The PCM monitors the heater driver to ensure it operates within safe limits, and this code sets when the driver current or temperature exceeds a calibrated threshold, typically due to a short to ground or a failing heater element.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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