ludwiglight9

Peugeot 508 Engine Power Loss

I'm experiencing issues with my 2018 Peugeot 508 gasoline. It's done 123348 km. The check engine light is on, and I'm noticing significantly reduced engine power and poor engine response. At times, the engine even stalls at idle. My fuel consumption has also increased noticeably. I'm also hearing a whistling noise, which turns into a loud hissing when accelerating. I suspect a bad boost pressure system. My initial thought is the wastegate valve is defect. Anyone experienced similar symptoms?

The conversation centers around a 2018 Peugeot 508 experiencing engine power loss, poor response, increased fuel consumption, and a whistling noise that turns into a hissing sound. The initial suspicion was a defective wastegate valve, which was confirmed after a workshop diagnosis. The solution involved replacing the wastegate valve, resolving the issues and restoring the vehicle's performance.

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4 comment(s)

Whoa, those are some serious symptoms! Sounds eerily familiar to what I went through with my Peugeot 508. Check engine light, power loss, the works! The whistling turning into a hiss is a dead giveaway. Have you checked the intercooler pipes or the throttle body for any leaks or damage? It could also be the MAP sensor acting up. I was chasing turbo lag like crazy before figuring out the issue.

Interesting, thanks for your input! I was mainly suspecting the wastegate valve. Regarding the intercooler pipes and throttle body, are there any specific areas I should focus on when inspecting them? Also, could a faulty MAP sensor really cause such a dramatic loss of power and the stalling issue?

Absolutely, a faulty MAP sensor can wreak havoc! It's like the brain getting bad intel. As for the intercooler pipes and throttle body, check all the connections and seams first. Look for any oily residue, which is a sign of a leak. Given the loud hissing, it's probably a decent-sized leak. To be honest, with all those symptoms combined, it's probably more than just a simple fix. I'd recommend getting it properly diagnosed at a workshop to pinpoint the exact culprit before throwing parts at it. Might save you some headaches and money in the long run.

Thanks a lot for sharing your experience and insights! I appreciate the advice. I took it to the workshop, and it turned out to be indeed the wastegate valve. They replaced it, and the total repair cost came to 860€. Now, the Peugeot runs smoothly again.

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PEUGEOT

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508