U0658Lost Communication With Windshield Temperature Sensor
- Generic OBD-II code · Network
- How the car detects it
- To keep the glass clear before it mists, an automatic climate system can compare the temperature of the inner windshield surface with the cabin air's dew point right in front of it. Suppliers such as Sensirion (SAAF) and ScioSense (WSS2) build this into one small module at the mirror base that computes the dew point itself and reports over LIN at 19.2 kBd. U0658 is stored when the climate master stops getting answers from that glass sensor. No maker documents this exact code in public; FCA logs the same kind of loss as its own U1190 in the BCM, and a Pacifica case shows it appearing during remote start with nothing to replace. Without the reading the controller can only react once fog is visible, so the windshield may mist up in damp or cold weather.
- What you may notice
- Windshield fogs before the climate system responds
- Automatic defog or anti-fog function inactive or less effective
- Other sensors on the same mirror-base LIN line may also be missing
- Likely causes
- LikelySensor not clipped back, unplugged or without glass contact after windshield replacement
- PossibleLoose or damaged plug or LIN wire at the mirror base or headliner
- PossibleElectronics of the humidity and glass temperature module failed
- RareCode logged in a wake-up phase such as remote start without a real fault
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.