Peugeot 308 rough cold starts

I've got a 2017 Peugeot 308 diesel with nearly 250k km. It's running rough during cold starts and struggles until it warms up. I've also got an error code and increased fuel consumption. Thinking it might be the PTC heater? Anyone else had similar issues with cold air, blower motor or temperature control? The heat doesn't seem to be working properly. Is the heater repair worth it?

4 comment(s)

Sounds familiar. Had similar symptoms on my old Renault Megane. Is the error code pointing towards the electric auxiliary heater? If so, that's likely your culprit.

Yeah, the error code seems to be pointing towards the electric auxiliary heater. What was the damage on your Megane? Was it a straight-up replacement?

Yep, auxiliary heater was shot. Same symptoms: poor cold starts and higher fuel consumption. The workshop diagnosed a defective electric auxiliary heater and swapped it out. Cost around 350€. Might be worth getting yours checked.

Thanks for the info. Seems like I'm heading towards the workshop then. Appreciate the help!

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