DS4 engine stalling and power reduction

I'm experiencing an issue with my Citroen DS4, 2021 build, hybrid engine. The check engine light keeps illuminating, the engine sometimes stalls when idling, and there's a noticeable reduction in engine power. I've checked the usual suspects like the air filter and spark plugs, but nothing seems out of order. Could it be a fuel economy problem?

4 comment(s)

Hey there! I also drive a DS4, and your problem sounds awfully familiar! I had something similar happen to mine last year. Did you notice any difference in how the car drives when it's cold?

Interesting! Yes, now that you mention it, the engine seems particularly rough when it's cold. It improves slightly as it warms up, but the reduced power and occasional stalling persist. What ended up being the issue with yours?

Yep, sounds like the high-pressure fuel pump might be defective, causing the fuel regulator to go haywire. That’s exactly what happened to mine! I'd suggest getting it checked out by a professional ASAP. It's not something you want to leave unattended.

Thanks a bunch for the insight! I took it to the workshop, and it turns out the high-pressure fuel pump was indeed the culprit. They replaced it, which cost me around 1510€, and now it runs like new. I appreciate you sharing your experience!

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