Koleos Stalling at Idle

I'm having trouble with my 2022 Renault Koleos gasoline. It's got about 227k kilometers on it. Lately, the check engine light has been popping up, and I pulled the codes – it seems like it's related to the idle air control valve. The engine stalls at idle sometimes, which is pretty annoying. I'm thinking the intake might be heavily contaminated, leading to this IAC valve issue. Anyone else experienced this?

4 comment(s)

Hey! I had something similar happen with my Koleos (though it's an older model). Stalling at idle and the check engine light are classic symptoms. Have you noticed any rough idling before it completely stalls, or any issues when the engine is cold?

Yeah, there's definitely some rough idling happening before it stalls, and it seems worse when the engine is cold. Did you end up replacing the IAC valve, or was it something else?

I played around with cleaning it but ended up going to the workshop. It turned out the intake was indeed heavily contaminated, messing with the IAC valve. Honestly, save yourself the headache and get it checked by a professional. My bill was around 425€, including parts and labor.

Thanks for the heads-up! Seems like a trip to the workshop is inevitable. I appreciate you sharing your experience.

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