Peugeot 407 Overheating Communication Error

My 2007 Peugeot 407 diesel is giving me headaches. Getting a control unit communication error. Engine overheats, check engine light's on, and coolant's spilling under the car because of excessive pressure. Mileage is at 220209 km. Suspect a dodgy cable or plug connection somewhere. Anyone seen this before?

4 comment(s)

Sounds familiar. I had similar symptoms with my 407. Was anything specific triggering it, or was it just random?

Random, really. No pattern that I can see. What was the fix for yours?

Turned out to be a corroded connector on the CAN bus. Check the wiring, but honestly, might be best to get it diagnosed properly at a workshop. Could save you time and hassle.

Cheers. Appreciate the insight. Ended up being a defective plug connection as suspected. Cost me 95€ at the workshop.

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