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Home >> Chrysler >> 2011 >> 300 Base, Gas >> Repair and Diagnosis >> Engine Performance >> System >> 3.6L - DTCS P000A To P0159 >> Diagnosis and Testing >> P0141-O2 Sensor 1/2 Heater Performance >> Theory of Operation

Theory of Operation

This diagnostic provides a continuous check of the O2 Sensor Heater circuit during operation. The heater circuit is momentarily disabled to allow a resistance measurement to be taken to infer heater temperature. The current delivery to the heater is duty cycled to maintain a specific target temperature. The error from the target temperature is continuously monitored to assess heater performance.

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