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MotorGround >> 2006 Colorado, Check Engine Light

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1/28/07 3:53 PM
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Jack Carter
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Edited: 28-Jan-07
Member Since: 01/25/2004
Posts: 25831
 
New 2006 Chevy Colorado, 3.5-liter. Check Engine light came on a few days ago. I filled my gas tank up with 91 octane instead of 87 and the check engine light turned off. Experts, explain.
1/28/07 5:18 PM
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Mark1
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Edited: 28-Jan-07
Member Since: 01/01/2001
Posts: 23497
Your gas cap wasn't on all the way when you filled up with the 87. Mark
1/29/07 12:14 PM
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ArmbarKing
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Edited: 29-Jan-07
Member Since: 05/02/2002
Posts: 6220
^^^We have a winner^^^
1/29/07 8:42 PM
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Jack Carter
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Edited: 29-Jan-07
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I double checked it to see if it was on all the way and still the light was on. Now, it goes on during some starts and stays off during some starts.
1/29/07 10:51 PM
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ArmbarKing
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Edited: 29-Jan-07
Member Since: 05/02/2002
Posts: 6222
Okay so maybe it isn't the gas cap. Probably an emissions related code, take it in to the dealer and get them to check it out for you. My dealership has replaced 3 or 4 heads on these vehicles after diagnosing engine lights, so definitely worth getting looked at. Try and bring it to them with the light on though so they can scan it and have a hard code.
1/30/07 10:14 AM
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Ponyboy
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Edited: 30-Jan-07
Member Since: 01/01/2001
Posts: 9958
The code is stil there under history codes in the obdII menu. The light clears after a certain amount of start cycles. Don't run the car while filling it and please tighten the cap like a real man next time.
1/30/07 2:39 PM
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ArmbarKing
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Edited: 30-Jan-07
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Posts: 6227
If it is coming on intermittently like that though I don't think it will be a gas cap. If the gas cap was loose and you tightened, the light would go off after the vehicle ran through a certain amount of test cycles, might take a few days or more. But for it to be coming off and on intermittently like that I think you probably have another problem.
2/8/07 6:05 PM
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Jack Carter
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Edited: 08-Feb-07
Member Since: 01/25/2004
Posts: 26149
ArmBarKing, you're right. I have an intake manifold leak causing a misfire of several cylinders. Truck will remain in shop for at least 2 weeks. This is a common problem with this line of GM, and when I said that to the service manager he said "This is the first time I've ever come across a GM truck with this problem and we get a lot coming through here"
2/8/07 10:42 PM
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ArmbarKing
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Edited: 08-Feb-07
Member Since: 05/02/2002
Posts: 6294
It could be the first one they have seen, we only started seeing them in the last month and a half or so, but they will start to see more. Getting parts for those bastids is a pain in the ass.
2/9/07 9:31 AM
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Ponyboy
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Edited: 09-Feb-07 09:32 AM
Member Since: 01/01/2001
Posts: 10000
I guess the codes were P0300 and a few from P0301 to P0308 depending upon which cylinders had the misfire. Listing the codes that caused the check engine light would have gone a long way.......
2/24/07 7:01 PM
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Jack Carter
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Edited: 24-Feb-07 07:01 PM
Member Since: 01/25/2004
Posts: 26832
17 days in the shop. Just got it back out today. A cylinder head to be replaced among other things. After a few minutes of driving, I notice the Check Engine Light was still on. Gotta take it back on monday. Hopefully they just need to reset the computer. Otherwise, they might have missed a loose valve seat? Grrrrrrrrrrrrr.

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