lillykrueger1
Captur check engine light and smoke
Summary of the thread
A 2018 Renault Captur diesel is experiencing a check engine light, reduced engine power, and smoke, possibly due to a defective crankcase ventilation valve. This issue can lead to emissions problems and potential engine damage if not addressed. The suggested solution is to have the vehicle professionally diagnosed and repaired, which resolved the problem in this case.
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4 comment(s)
lillykrueger1 (community.author)
Yes, the idle is a bit rough, now that you mention it. By 'emissions issues', do you mean a simple sensor problem, or something that could damage the engine? Also, what kind of leak are we talking about?
alexanderlion91
Well, if the crankcase ventilation isn't working right, pressure can build up and gases might leak where they shouldn't, and that impacts emissions. Also, that pressure buildup can definitely cause damage down the line if ignored. Given the smoke, reduced power, and now you're mentioning a rough idle, the defective crankcase ventilation becomes ever more likely. I really think your best bet is to get it professionally diagnosed by a workshop – hopefully it's a straightforward fix!
lillykrueger1 (community.author)
Thanks for the advice! I took it to the shop as suggested, and it was indeed the crankcase ventilation valve causing the problem. The repair cost me 360€. Everything seems to be running smoothly again.
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RENAULT
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CAPTUR
alexanderlion91
Oh my goodness, a check engine light AND smoke? That sounds serious! Is the engine idling rough too? It could be anything really but a faulty crankcase ventilation valve could cause emissions issues and lead to a leak. I’d get it checked soonest!