Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2017 Chevy Tahoe P0340 P0314
- tbean
-
Topic Author
- Offline
- New Member
-
10 months 2 weeks ago #83852
by tbean
2017 Chevy Tahoe P0340 P0314 was created by tbean
My shop replaced the engine for a 2017 Chevy Tahoe 5.3 with a rebuilt Jasper with AFM delete. The truck is now storing a code P0340 and P0341 for the CMP sensor. I checked for 5V reference, ground, and scoped the signal. The ref circuit checked good and the ground checked good with a test light. The scope image of the signal circuit showed a shark fin waveform switching from 3V to ground with no drop outs. I swapped the CMP with an OEM sensor and I'm getting the same code and same scope image. Is it possible to have a tone wheel issue with the CMP causing the funky shark fin waveform instead of a clean square wave? Possibly the timing cover isn't aligned properly causing an air gap issue? Has anyone else ran into this?
CMP DSO Image
Please see the attached Scope Image.
Please Log in or Create an account to join the conversation.
- Lupe
-
- Offline
- Premium Member
-
- tbean
-
Topic Author
- Offline
- New Member
-
- Noah
-
- Offline
- Moderator
-
- Give code definitions with numbers!
Time to create page: 0.275 seconds