Please help with troubleshooting
Thread Starter
Instructor
Joined: Feb 2019
Posts: 161
Likes: 14
Please help with troubleshooting
I am getting a check engine light with P0171 and P0174. No mods or upgrades. I cleared the codes but they come back as soon as the engine is up to normal operating temp. Any help wold be appreciated.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,600
Likes: 4,060
From: Cape Coral, Florida
May be a vacuum leak !!...have you recently cleaned the MAF sensor ????...check the air bridge between the MAF and Throttle Body for leaks or loose connections...do you have a scan tool ??...we can verify with that. PLEASE include the model year and all mods either here or in your profile...this helps us help you !!
Last edited by C5 Diag; Jun 6, 2020 at 07:51 PM.
