Espace engine overheating coolant leak

I'm having a weird issue with my 2015 Renault Espace (gasoline engine). The engine is overheating, the check engine light is on, and I've noticed coolant leaking under the car. Seems like it's building up too much pressure. I've checked the coolant level and it seems okay when the engine is cold. Any ideas?

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Hello, I had a similar problem with my Renault Espace. From the symptoms you describe, I suspect a connectivity issue related to one of the engine control units. It's possible that a faulty cable or plug connection is causing incorrect data transmission. This can lead to the engine not being managed properly and causing the overheating and pressure issues.

Thanks for the quick reply! A connectivity issue... that sounds serious. Do you remember what exactly was wrong with yours? Was it a specific sensor or module?

While I can't pinpoint the exact sensor or module in my case, I do recall that the diagnosis pointed to a problem within the CAN bus system, which is responsible for communication between the various electronic control units in the car. I strongly recommend a visit to a workshop to perform car diagnostics. If it is a defective cable or plug connection the repair cost shouldn't be significant.

Took it to the shop, and you were right! It was a faulty plug connection on one of the control units. They cleaned it up, reconnected everything, and the problem seems to be solved. Cost me 95€, so not too bad. Thanks a lot for your help!

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