VW Golf Temperature Sensor Failure Affects Multiple Systems

Had a similar situation with my 2009 VW Jetta TDI. The symptoms you describe match exactly what I experienced. As someone with basic DIY experience, I initially thought about tackling the car temperature sensor replacement myself. After checking the wiring, I discovered the main issue was actually a damaged connection at the sensor plug, not the sensor itself. The workshop found corroded terminals where the temperature sensor connects to the wiring harness. The sensor calibration process was automated through their diagnostic system after fixing the connection. Total cost was 95€ for diagnosis, repair, and testing. The vehicle temperature gauge started working correctly immediately after the fix. All related systems, AC, mirror heating, and washer nozzles, returned to normal operation. To provide more specific guidance: Could you share if youve checked the wiring near the sensor for visible damage? Also, which specific fault code is showing up on your reader? These details would help determine if your issue matches what I encountered. Based on my experience, having a professional handle the sensor replacement and calibration is worth it, especially since multiple systems are affected. They can properly test the entire circuit and ensure proper sensor calibration after the repair.

Had it checked during my last service at 149285km. The mechanic initially suspected a simple sensor malfunction but found the outside temperature sensor was completely dead. They performed a full temperature sensor replacement including proper sensor calibration. All systems are working perfectly now, AC engages normally, mirror heating works, and no more frozen washer nozzles. The repair cost was 180€ total, including parts and labor. While its not a complex fix, the professional sensor calibration after installation was essential for getting all systems working together properly. If your fault codes match mine, its definitely worth getting the temperature sensor replacement done professionally rather than risking a DIY approach that might need recalibration anyway.

Thanks for sharing your repair outcome. The sensor calibration process on your Golf sounds identical to what I experienced with my Jetta. The 180€ total cost is pretty standard considering they did a complete temperature sensor replacement with proper calibration. Your mechanic took the right approach by doing a full system check before replacing parts. Like in my case, a thorough diagnosis helped identify the real issue, though yours needed the complete sensor replacement while mine was just connection related. What stands out is how the temperature monitoring systems all returned to normal after fixing the sensor issue. This really confirms that a faulty car temperature sensor can cause multiple system failures simultaneously. The professional sensor calibration step is crucial, thats what I learned from my repair as well. For others reading with similar sensor malfunction symptoms: the cost difference between my connection repair (95€) and a full temperature sensor replacement (180€) shows why proper diagnosis matters before replacing parts.

Thanks everyone who shared their experiences. Really glad I asked here before attempting any DIY fixes on the temperature sensor system. To close out this thread, the vehicle temperature sensor replacement completely resolved all issues (AC, mirror heating, washer nozzles). The 180€ repair cost was worth it for the professional installation and sensor calibration. The mechanic mentioned they see these sensor malfunction symptoms fairly often in VWs of this age. For anyone else dealing with similar sensor diagnostics issues: getting a proper diagnosis first saved time and potentially unnecessary parts replacement. The calibration process after installing the new car temperature sensor was essential for restoring full functionality to all connected systems. Thanks again for helping me understand what I was dealing with before heading to the shop.