P0342 code
Thread Starter
4th Gear
Joined: Oct 2025
Posts: 4
Likes: 0
P0342 code
hey all, buying a C5. Only issue is P0342 code and some weird noises idling. Also a hiss when shutoff. Is it usually a major repair/issue? Car is perfect cosmetically and everything else that makes it worth it. Or do I stay away?
Last edited by dreamhackian; Oct 8, 2025 at 08:13 AM.
Burning Brakes
Joined: Dec 2022
Posts: 1,031
Likes: 892
From: Nappytown MD
It could be a few different things, so is it expensive to fix? Depends on who you have fix it and what their rates are and ultimately what it takes to correct the issue. I wouldn't drive that car much or even start it until I got that figured out. That code is for the Cam Shaft sensor, so it could be the sensor, it could be an issue with the wiring or PCM.
Thread Starter
4th Gear
Joined: Oct 2025
Posts: 4
Likes: 0
It could be a few different things, so is it expensive to fix? Depends on who you have fix it and what their rates are and ultimately what it takes to correct the issue. I wouldn't drive that car much or even start it until I got that figured out. That code is for the Cam Shaft sensor, so it could be the sensor, it could be an issue with the wiring or PCM.
Burning Brakes
Joined: Dec 2022
Posts: 1,031
Likes: 892
From: Nappytown MD
Depends, are you capable of swapping out a cam sensor? If the sensor is good, then you have to chase either a wiring or PCM issue. I would say "most" of the time it might just need the new cam sensor, but that is a shot in the dark not knowing the actual condition of the car and the wiring etc.
This video is about swapping out one and other stuff
This video is about swapping out one and other stuff
Tech Contributor
Joined: Jan 2007
Posts: 19,451
Likes: 1,155
From: Dyer, IN
Stay away. Plenty of well maintained c5's out there.
