PO343 Help
Thread Starter
Instructor
Joined: Dec 2010
Posts: 211
Likes: 0
From: Spring Texas
PO343 Help
I am getting the PO343 Cam Position sensor voltage high code and after cleaning all my grounds and checking all the wiring I need advice on which direction to go next. I did a search and from what I found it seems that these sensors usually do not go bad. It seems that the cam sprocket bolts become loose do to gm not using loctite.
I had a cam package installed 7 months ago at a very reputable shop so I believe that they would torque to spec and use loctite on the bolts. That being said what should I do now?
Should I try to replace the sensor myself?
Should I send it back to the shop and let them check the bolts?
If it is the bolts, should I have to pay out of my pocket?
I'm planning on calling the shop tomorrow to see what they say but wanted to get some advice before I do. Thanks in advance!
I had a cam package installed 7 months ago at a very reputable shop so I believe that they would torque to spec and use loctite on the bolts. That being said what should I do now?
Should I try to replace the sensor myself?
Should I send it back to the shop and let them check the bolts?
If it is the bolts, should I have to pay out of my pocket?
I'm planning on calling the shop tomorrow to see what they say but wanted to get some advice before I do. Thanks in advance!
Safety Car
Joined: Aug 2004
Posts: 4,734
Likes: 232
From: Youngstown Ohio
I had that code come up after a SC install, within a hundred miles of driving. I changed out the sensor first in hopes that was the issue. While it was out checked the connection for corrosion and continuity to the computer. Wiring checked out, connection was good so in went the new sensor and still had the code. Shop took the timing cover off to check the bolts and they were loose, all three.
As for where you should start first that's really up to you and your shop, that sensor can go bad and the bolts could have backed out so take your pick.
Good luck,
Darion
As for where you should start first that's really up to you and your shop, that sensor can go bad and the bolts could have backed out so take your pick.
Good luck,
Darion
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
