Camry solar sensor code and weak heat

I have a Camry too, though I don't remember the exact year. I had similar symptoms. Did you check the sensor's cable? In my case, this solved the issue.

Cable, huh? So, did you just wiggle it a bit or did you actually replace something? Just trying to gauge how deep I need to dive into this thing.

In my case, wiggling it did nothing. Further inspection revealed slight corrosion inside the plug. Cleaning it with contact spray solved the problem. However, since your heating output is too low, I would suggest you to let a workshop check it.

Right, so the shop confirmed it was the solar sensor connection – corroded just like you guessed. They cleaned it up and cleared the code. Cost me 95€. Thanks for the heads up!