Passenger Compartment Temperature Sensor Circuit Range/Performance Problem

The passenger compartment temperature sensor measures the inside temperature of the vehicle. If it reads too high or too low for too long, the computer thinks there's an issue and sets a fault code.

The computer monitors the resistance of the temperature sensor circuit. It expects a resistance range correlating to temperatures between 0°C (32°F) to 50°C (122°F). If the readings are outside this range, it triggers the fault code.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Check the connector at the passenger compartment temperature sensor for corrosion or damage. Repair or replace if necessary. Decision: If wiring is bad, repair it and clear the code; if not, proceed to next step.
2. 22. Measure the resistance of the temperature sensor at room temperature (approx. 25°C). It should read around 500-1,500 ohms. Decision: If it falls outside this range, replace the sensor; if within range, proceed to the next step.
3. 33. Inspect the wiring harness from the sensor back to the control module for shorts or opens. Use a multimeter to check continuity. Decision: If there's a break, repair it; if wiring is good, the sensor likely needs replacing.

• Faulty passenger compartment temperature sensor
• Short or open circuit in the wiring
• Poor electrical connections at the sensor
• Incorrectly installed or misaligned sensor

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