DTC codes / P24xx · Auxiliary emission controls / P24C6
P24C6 indicates that the powertrain control module has detected an abnormal condition in the temperature sensing circuit of the particulate matter sensor, which is used on diesel engines to monitor soot loading in the exhaust. The computer compares the sensor's temperature signal against expected values and flags the circuit when the voltage or resistance falls outside the valid range for the current operating conditions.
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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