linahahn71
C6 Reduced Engine Power
Summary of the thread
A 2019 Citroen C6 with a petrol engine experienced reduced engine power and multiple error codes. The issue was suspected to be related to the engine control unit, with a defective main relay identified as a possible cause. After taking the car to a workshop, the main relay was confirmed as the problem, and replacing it resolved the issue, restoring the vehicle's performance.
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4 comment(s)
linahahn71 (community.author)
Engine control unit, eh? That sounds expensive! Is it a common issue on the C6, any idea what caused yours to fail like that?
oliverkoenig8
Yeah, sounds expensive, but don't panic just yet. Defective main relay is a possible cause. Honestly, it sounds really similar from what I experienced. I'd take it to a decent independent workshop, and they will be able to check for sure. Worth it for the peace of mind, I reckon.
linahahn71 (community.author)
Thanks a bunch for the info! I took it to a local shop, and you were spot on – main relay was the culprit. New relay, system reset, and she's back on the road. Total cost was only 120€! You saved me a fortune and a whole lot of stress!
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CITROEN
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C6
oliverkoenig8
I know that exact pain! I've got a C6 as well, and those reduced power issues are the worst. I bet it's main relay defective, have you checked that? I am guessing it's the engine control unit playing up, right?