Faulty Temp Sensor Disrupts Multiple Chrysler Systems

Had similar symptoms with a 2013 Chrysler Town & Country. The outside temperature sensor malfunction affected multiple systems including AC, mirror defrost and washer nozzle heating. Initial diagnostic scan revealed the car temperature sensor was sending incorrect readings to the control module. The issue was actually simpler than expected, corroded wiring connections at the sensor plug were causing intermittent signal problems. The temperature sensor replacement itself was straightforward, but the real fix involved cleaning the connector pins and applying dielectric grease to prevent future corrosion. This wasnt a major repair job, but leaving it unfixed could have led to more serious electrical issues affecting other temperature-dependent systems. Key lesson: When multiple temperature-related systems act up simultaneously, checking the sensor connections should be the first step before replacing components. The vehicle temperature sensor and its wiring harness are often exposed to road debris and moisture, making them prone to connection issues. After the repair, all systems returned to normal operation. Regular inspection of sensor connections during routine maintenance can help prevent similar issues.

Really appreciate you sharing this information. I had almost identical issues with my 2011 Voyager last winter. The outside temperature sensor readings were all over the place, affecting multiple systems. After reading your post, I checked the connections and found the same corrosion problem. Quick question, do you remember roughly what the temperature sensor replacement and repair work cost you? Also, has everything been working properly since the fix? Looking back, I wish I had known about checking the sensor connections first. Would have saved time troubleshooting the car temperature sensor issues.

Just had the repair done last week actually. The mechanic confirmed it was exactly what I suspected, the outside temperature sensor fault was causing those erratic readings. Like in my previous post, no sensor replacement was needed. The fix involved cleaning and repairing the cable connection at the plug, plus adding some protective coating to prevent future corrosion. Total cost was 95€ for labor and materials. All systems are working perfectly now. The vehicle temperature gauge shows accurate readings, the AC responds normally, and the mirror heating works great in cold conditions. The car temperature sensor diagnostics also show clean readings with no error codes. Really glad I could help identify the issue. Regular sensor calibration and connection checks during maintenance can definitely prevent these problems from recurring. Sometimes what seems like a complex temperature sensor malfunction turns out to be a simple connection issue.

Thanks to everyone who replied. Just wanted to update on my repair experience. Finally got the car fixed yesterday after finding a reliable mechanic through a. The outside temperature sensor connections were indeed corroded, just as suggested. The mechanic cleaned the sensor contacts, applied protective coating, and checked all related systems. Total repair cost came to 120€, which included a full diagnostic scan. The vehicle temperature sensor now gives accurate readings, and all systems are working perfectly, AC, mirror heating, and washer nozzles included. No more error codes showing up on the dash. Big relief it wasnt a major sensor replacement job. The mechanic mentioned these sensor malfunction issues are pretty common in older models, especially around the connections. They recommended checking the sensor connections during regular maintenance to prevent future problems. Really glad I asked here first before assuming the worst. Saved both time and money by knowing what to tell the mechanic to check.