Renegade Temperature Sensor Issues Cripple AC & Heat

I had almost identical issues with my 2012 Jeep Compass diesel. Having some experience with sensor diagnostics, I initially thought it was just the AC, but multiple temperature-related problems pointed to a central issue. The outside temperature sensor replacement turned out to be the solution. My mechanic performed a full temperature monitoring test across different systems and found that the sensor was sending incorrect readings to multiple components. The main problem was a damaged wire connection at the sensor plug. The repair involved: Testing sensor output values, Checking electrical connections, Replacing the temperature sensor and damaged wiring, Clearing error codes, System verification Total cost was 95 Euro for parts and labor. Since the fix, all temperature-related systems have worked perfectly. Can you share your specific error code? Also, when did these issues first appear? This information would help determine if your case matches what I experienced. The temperature sensor replacement process can vary between different trim levels.

Thank you for sharing your experience. My error code is P0073 and these issues started about 2 months ago after my last service at 77073 KM. The car temperature sensor malfunctions seem more frequent in wet weather. The information about the damaged wire connection is particularly helpful since my washer nozzles and mirror heating show similar symptoms to what you described. Your systematic approach to temperature sensor replacement and testing makes a lot of sense. The quoted repair cost seems reasonable compared to what I was quoted at 150 Euro for diagnostics alone. I will have my mechanic specifically check the sensor wiring and connections before proceeding with a full replacement.

Thanks for the follow-up. Yes, the P0073 code is exactly what I encountered with my Compass. The correlation with wet weather suggests moisture infiltration at the sensor connection point, which matches my experience. After seeing the mileage where your issues started, I should mention that my temperature sensor malfunction began around 75000 KM, very close to your situation. The 150 Euro diagnostic quote seems high compared to the actual repair cost. The wiring issue in my case was located where the temperature sensor harness passes through the front bumper area. Over time, moisture had corroded the connections. When my mechanic performed sensor diagnostics, he found intermittent readings that worsened in damp conditions. I can confirm that proper vehicle temperature sensor testing should include: Resistance checks at different temperatures, Connector integrity verification, Signal output monitoring under various conditions Rather than immediate sensor replacement, have them inspect the wiring first. In many cases, repairing the connection solves the issue without needing a new sensor.

The timing of these symptoms appearing after my service visit at 77073 KM makes more sense now. The weather correlation you mentioned perfectly matches my experience with the vehicle temperature sensor acting up during rainy days. Your situation with the wiring harness near the front bumper is particularly relevant since my washer nozzles started malfunctioning around the same time. Having seen how closely our cases match, including the P0073 code and similar mileage points, I feel more confident about the repair direction. I will specifically request the resistance checks and connector integrity tests you mentioned before proceeding with any outside temperature sensor replacement. The potential saving is significant if it turns out to be just a wiring issue rather than a complete sensor failure. The detailed sensor calibration and testing process you outlined will help me better discuss the repair with my mechanic. I appreciate knowing that the actual repair might cost closer to 95 Euro rather than the quoted 150 Euro diagnostic fee.