1986 corvette service engine light
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Intermediate
Joined: Apr 2012
Posts: 37
Likes: 0
1986 corvette service engine light
Well I changed the 02 and started the engine and let it run for a bit, and the light was out I was glad to see it was out, then shut the car off and started the car back up and the light came back on. have know idea why this happen again. does anybody no what I can do too correct this problem? any help would be nice.
Melting Slicks
Joined: Nov 2007
Posts: 2,830
Likes: 147
From: Gainesville FL
Check Codes and report back
To recover ECM codes from the 1984 through 1993 Corvette, place a short between pins "A" and "B" on the ALDL (Assembly Line Diagnostic Link) connector. This connector is located under the dash just to the right of the steering column and has space for 12 pins although not all of the cavities will be populated.
Turn the ignition switch to "On" but do not start the engine.
Depending on the model year, either the "Check Engine Light" or the "Service Engine Soon" will begin to flash.
As the code display sequence begins, you will see a flash followed by a pause and then two flashes. This is the indication for the number "12". The number 12 is a delimiter intended to show where the ECM code display starts and stops.
Code 12 will flash three times and then any stored codes will flash. When all codes have been displayed or if there are no stored codes, the number 12 will again flash three times.
Post the codes and somebody here will help you. There is a list of fault codes somewhere in the forum do a search if you can't wait.
Turn the ignition switch to "On" but do not start the engine.
Depending on the model year, either the "Check Engine Light" or the "Service Engine Soon" will begin to flash.
As the code display sequence begins, you will see a flash followed by a pause and then two flashes. This is the indication for the number "12". The number 12 is a delimiter intended to show where the ECM code display starts and stops.
Code 12 will flash three times and then any stored codes will flash. When all codes have been displayed or if there are no stored codes, the number 12 will again flash three times.
Post the codes and somebody here will help you. There is a list of fault codes somewhere in the forum do a search if you can't wait.
Last edited by 3D-Aircrew; Sep 27, 2013 at 08:09 PM. Reason: Added stuff
Safety Car
Joined: Jan 2004
Posts: 3,556
Likes: 13
Why ?
Have you pulled the codes since replacing the O2 sensor to see if any ( different ) codes are present
Find out why the light is on ....................
Have you pulled the codes since replacing the O2 sensor to see if any ( different ) codes are present
Find out why the light is on ....................
