joachimwolf1

Cobalt knock sensor issue

I'm having trouble with my 2004 Chevrolet Cobalt (gasoline engine). The check engine light is on, and I've noticed worse fuel economy and rough idling. Diagnostics point to a bad knock sensor. I'm thinking it might be the sensor's cable or plug. The car has about 65912 km on it.

A 2004 Chevrolet Cobalt is experiencing a persistent check engine light, poor fuel economy, and rough idling, with diagnostics indicating a potential knock sensor issue. The problem may stem from a faulty knock sensor, its cable, or plug. A professional inspection is recommended to confirm the diagnosis and resolve the issue.

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4 comment(s)

I had a similar problem with my Cobalt. Was the check engine light always on, or did it come and go? Did you feel any changes in how the engine ran, like it hesitating when you accelerated?

The check engine light stays on all the time. I haven't really felt any hesitation when accelerating, but the rough idling is definitely there. Does that sound like what you experienced?

Yeah, that's pretty much what I went through. With the light always on and the idling issue, you might want to get a mechanic to look at it. The repair set me back around 95€.

Thanks for the info. I'm going to get it checked out by a professional and get it fixed. Your advice was really helpful.

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CHEVROLET

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COBALT