Service Engine Soon Light
But, with a lower octane you get less spark advance and less engine power.
Something else is setting that code, you need to get a scanner and find out why. Or you can clear the codes and see if it comes up again.
I too was looking for the same information with regards to "clearing the codes". In the TECH TIPS section you can find the procedure under DTC codes...however, since you and I are in the same boat I cut and pasted it here on the reply, so you won't have to look anything up! I won't take credit for it, someone else did the leg work for us.
Ron
Erasing DTC Codes -- 1 of 1
Date Published: 2001-06-09
Submitter's Name: IH8PONYS
Email Address:
Corvetteforum.com Member Alias: IH8PONYS
You can acess all of the cars trouble codes from the dic and erase them! I know it works on my 99 but, I am not so sure on the earlier C5's. Here is what you do:
Press and hold options and then press Fuel 4 times while still holding the options button you must do this quickly. A message will appear saying "Diagonstics" then it will automatically read off the codes. Like....02-PCM(No codes)....03-BCM(No Codes)...ect. if there is a code it will look something like this 02-PCM (1052H) NOTICE THE H at the end of the code, That represents a code that has happened in HISTORY. If there is a C after the code it is CURRENT.
To clear the codes let it automatically cycle through the codes then it will come to (MANUAL DIAGNOSTICS) this is where you can clear codes. Use the options button to scroll forward and the TRIP to scroll backward find the code(s) to be erased like 02-PCM (2Codes). To erase this, press and hold the reset button until it says "NO CODES" There you have done it!!!. To exit the Diagonstic menu press the METRIC BUTTON!!!
:smash: :smash: I hate trouble codes








