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victoriastorm5

Peugeot 307 Overheating and Coolant Leak

Hi, I have a 2004 Peugeot 307 with a gasoline engine. I'm experiencing some issues that I can't figure out. The engine overheats, the check engine light is on, and there's coolant leaking under the car – seems like there's too much pressure in the cooling system. I'm suspecting a control unit communication error, I read something about it a while ago, but don't remember all the details. Has anyone else run into something similar?

Summary of the thread

A 2004 Peugeot 307 was experiencing engine overheating, a check engine light, and a coolant leak, possibly due to excessive pressure in the cooling system. The owner suspected a control unit communication error. A suggestion was made to check for error codes and inspect the ECU connection. The issue was resolved at a workshop, where a defective cable connector was identified and repaired.

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4 comment(s)

achimdavis1

That sounds rough. Could be a data link issue. Did you check the error codes already? I remember a similar problem with my old Citroen, the connection to the ECU was loose. I hope it's a simple fix for you too.

victoriastorm5 (community.author)

Thanks for the suggestion! I haven't checked the error codes yet, but where exactly should I be looking for the ECU connection? Is it easy to access?

achimdavis1

Well, I am not sure about the exact location in your Peugeot 307, but if it gives you headache, I would recommend taking it to a workshop. Overheating can be nasty, and you don't want to risk more damage.

victoriastorm5 (community.author)

Thanks, I appreciate the advice. I took it to a shop, and it turned out a cable connector was defective. They fixed it for 95€. Everything seems to be working fine now.

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PEUGEOT

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307