Peugeot 508 Heating Ineffective

Hello! Yes, a faulty solar sensor can definitely affect your heating. The car's climate control system uses that sensor to adjust the heating and cooling output based on sunlight intensity. If it's malfunctioning, the system might not be regulating the heat correctly. Are you seeing any other strange behaviour with the automatic headlights or windscreen wipers? Those systems sometimes share the same sensor data.

Thanks for the quick reply! No, the headlights and wipers seem to be working fine. Is there any way to test the sensor itself, or perhaps check the wiring, before I start replacing parts? I'm comfortable with basic DIY, but not sure where to start looking for the sensor.

Okay. Given that other systems relying on ambient light are functioning, and that the Diagnostic Trouble Code (DTC) points specifically to the solar sensor, the issue is likely isolated to that component or its immediate wiring. As you suggested a defective cable or plug connection of the component may be the cause. While you could attempt to visually inspect the wiring harness and connector, it's often difficult to pinpoint the exact fault without specialized diagnostic equipment. I recommend consulting a qualified technician. You may be looking at around 95€ for the repair.

Thanks for the advice, I appreciate it. I will take it to a workshop and have it checked. The price you're suggesting sounds reasonable.