Check engine light - C8 Corvette Forum
LinkBack Thread Tools
post #1 of 3 (permalink) Old 10-17-2020, 04:34 PM Thread Starter
Junior Member
Join Date: Mar 2020
Posts: 3
Check engine light

Driving my 2020 Corvette Z51a short while ago and the check engine light comes on and stays on. I called Onstar for a diagnostic check and their report shows ECM- Engine System Diagnostic code P0700. Next column is diagnostic information which says "IGNORE UNKNOWN DTC" and under Recommended information "No Action Needed"
Anyone else have this issue and can offer any advice? I sent the information to the dealer but don't expect anything back until tomorrow at the earliest. Thank you
[email protected] is offline  
post #2 of 3 (permalink) Old 10-28-2020, 11:10 AM
Junior Member
Join Date: Jul 2020
Location: Mason, Ohio
Posts: 2
I have the same problem after I installed an upgraded exhaust system from Hennesy. The dealer tried to fix it and failed. Seems to be related to the motors that control the exhaust noise. Am now trying to find any codes that fix it and so far no luck.
Chemlarry1 is offline  
post #3 of 3 (permalink) Old 02-19-2021, 07:59 AM
Junior Member
AF-Rider's Avatar
Join Date: Feb 2021
Posts: 1
Did you figure out what this was? I'm getting the same code.
AF-Rider is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome