Peugeot 308 Solar Sensor Fault

Oh, solar sensor issues... I feel your pain! I had something similar with my 308. Was the error intermittent at first, then became permanent? Check the wiring harness near the sensor itself. I remember fiddling with that area when I replaced the windshield washer pump, maybe I did something...

Intermittent at first, yeah, you nailed it! Where exactly is the sensor located, and which wiring harness are you talking about? Is it easy to get to?

It's right there on the dash, near the windshield. The harness... hmm, it's the one that runs along the base of the windshield, under the plastic trim. Honestly, if you're not comfortable poking around, I'd take it to a workshop. I ended up doing that; saved me a lot of grief!

Workshop it is then. It was a defective cable connection, just like we thought. Cost me 95€ to fix, but at least the heating is blasting again!