engine service light
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Why would you want to disable the light, it is telling you there is a problem with your car? 
See this link to pull the code and then use the factory service manual to repair the problem.
http://www.corvettebuyers.com/c4vettes/ecm.htm
See this link to pull the code and then use the factory service manual to repair the problem.http://www.corvettebuyers.com/c4vettes/ecm.htm
Thread Starter
Pro
Joined: Jul 2006
Posts: 636
Likes: 0
From: Cheshire Connecticut
Why would you want to disable the light, it is telling you there is a problem with your car? See this link to pull the code and then use the factory service manual to repair the problem.
http://www.corvettebuyers.com/c4vettes/ecm.htm
See this link to pull the code and then use the factory service manual to repair the problem.http://www.corvettebuyers.com/c4vettes/ecm.htm
thanks again.
Le Mans Master
Joined: Mar 2001
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
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St. Jude Donor '12
What year is your car?
IIRC the EGR code doesn't throw unless you are at highway speeds.
You could disconnect the battery for a few min, reconnect drive short distance to emissions with no SES light.
Maybe it has other issues??
IIRC the EGR code doesn't throw unless you are at highway speeds.
You could disconnect the battery for a few min, reconnect drive short distance to emissions with no SES light.
Maybe it has other issues??
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Instructor
Joined: Jun 2004
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From: Derry nh
Disconnect the wire from the ECM to the bulb. Find someone who knows how to build enectronic circuits. Have them design a simple timer circuit that will flash the bulb once after ignition is turned on. I have a similar situation with my '91. With the EGR removed the light only comes on while on the highway and is off when you start the car. I can live with that. You may be able to "trick" the ECM by putting a resistor/diode across the missing sensor leads. That won't work with the EGR though because of the way the test runs, using both the EGR and O2 info together.
Safety Car
Joined: Sep 2001
Posts: 4,150
Likes: 552
From: Glenbeulah Wi
Have someone reprogram the car to eliminate the devices that are no longer being used and this will eliminate the check engine light for those items but it will still work as required for the remaining equipment.
Safety Car
Joined: Mar 2005
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From: Winnipeg Manitoba, Canada
Le Mans Master
Joined: Mar 2001
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
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St. Jude Donor '12
Again the OP did not state the year of his car.
ODBII your ONLY option is to reprogram the computer and perform the required drive cycles.
Before 1996 the computer is ODBI and that trick works because they can't talk to the computer.
ODBII your ONLY option is to reprogram the computer and perform the required drive cycles.
Before 1996 the computer is ODBI and that trick works because they can't talk to the computer.
Le Mans Master
Joined: Mar 2001
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
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St. Jude Donor '12
OK, now we're talking.
SES is on so what codes specifically is it reporting?
There may be ways to clear each one so you can get through the test.
I know on my 92 the EGR code I get is triggered at highway speed under part throttle. As long as I avoid that circumstance I can keep the SES light off.
If it pops on during the test you can blame the tester for breaking your car
Sounds like the folks that suggested removing the bulb might be a solution for you.
SES is on so what codes specifically is it reporting?
There may be ways to clear each one so you can get through the test.
I know on my 92 the EGR code I get is triggered at highway speed under part throttle. As long as I avoid that circumstance I can keep the SES light off.
If it pops on during the test you can blame the tester for breaking your car
Sounds like the folks that suggested removing the bulb might be a solution for you.
Instructor
Joined: Jun 2004
Posts: 247
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From: Derry nh
Although removing the bulb or taping it over will work, that won't pass inspection since they'll likely be looking for the light to flash on during the bulb check when you first turn on the ignition. Covering or removing the bulb prevents you from seeing the light when there's a real problem with the car.
If your only issue is the EGR code, that typically isn't on when you first start the car. You can probably fake out the ECM for other sensors that are missing, but the EGR's a tough one to bypass.
If your only issue is the EGR code, that typically isn't on when you first start the car. You can probably fake out the ECM for other sensors that are missing, but the EGR's a tough one to bypass.
Race Director
Joined: Jul 2005
Posts: 13,685
Likes: 61
My main problem is an SES light on. The tech's printout said "EGR disconnected". Does that mean a hole in the hose, or stuck open? Doesen't match any GM code answers I can find, so maybe it was a visual?
I never paid attention to the SES light. I bought the truck new and it now has 459,000 miles, the 383 replaced the original 350 at 370,000. Drivability and mileage are fine, 15-16 highway with a 3.73 rear.
What should I look for?
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
Have you considered fixing the problem.
Why don’t you either use the car or use a scanner to find out what the codes are. Then you will know what you're up against. Then with that information it may be possible to repair if it is within reason for you. You're not even sure if the stuff you removed pertains to the codes or not.
It could easier to fix it than to go thru all these gyrations.
Why don’t you either use the car or use a scanner to find out what the codes are. Then you will know what you're up against. Then with that information it may be possible to repair if it is within reason for you. You're not even sure if the stuff you removed pertains to the codes or not.
It could easier to fix it than to go thru all these gyrations.