CODE = Poor Gas Mileage???
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From: JawJa
CODE = Poor Gas Mileage???
I've had poorer than normal gas mileage for some months now and can't really figure it out. Back in June, out of the blue, I had a P2176 code (first and only code I ever got) come up. It began by it not starting for a few tries, then started up with no problem???? After that, nothing's been out of the ordinary while driving, etc. Went to AZ shortly afterwards and they read it and it said "Minimum throttle position not learned ECM". Also. no other codes came up. Can this cause bad gas mileage??? I've looked on line, etc. but can't find if this could be a cause. Btw, I was normally getting 18 - 21 mpg and if I babied it around and on the causeway where I drive, I could get into the high 20's and even 30+ (if I was being ridiculous about it). Now i'm pushing it to get 13, 15, maybe barely 17, if I'm lucky. Anyway, I now have 19K and change on it and have not had any problems during my 4 1/2 years. Waterpump was replaced by the dealership last year but that's it. Anyone know?
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
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P2176
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
Sounds to me like you need to get your throttle body checked out. The ECM says one thing, the TB puts it somewhere else. Probably why your gas mileage sucks.
Elmer
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
Sounds to me like you need to get your throttle body checked out. The ECM says one thing, the TB puts it somewhere else. Probably why your gas mileage sucks.
Elmer
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Race Director
Joined: Dec 2006
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From: JawJa
P2176
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
Sounds to me like you need to get your throttle body checked out. The ECM says one thing, the TB puts it somewhere else. Probably why your gas mileage sucks.
Elmer
The difference between the predicted and the actual throttle position is more than a calibrated amount for more than 1.5 seconds.
Sounds to me like you need to get your throttle body checked out. The ECM says one thing, the TB puts it somewhere else. Probably why your gas mileage sucks.
Elmer
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
It is a positioning issue while running. You may need to have EFILive scanning your car while you are driving to see what the TB is actually doing. I doubt anything would jump out and bite you as to the cause of the problem. It might be gummed up or sticking so an inspection might help but the actual position of the TB vs the demanded position from the ECM is what causes the 2176 code.
Thread Starter
Race Director
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From: JawJa
It is a positioning issue while running. You may need to have EFILive scanning your car while you are driving to see what the TB is actually doing. I doubt anything would jump out and bite you as to the cause of the problem. It might be gummed up or sticking so an inspection might help but the actual position of the TB vs the demanded position from the ECM is what causes the 2176 code.
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Joined: Jun 2001
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From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Road trip! 
Yer only 2 hours away! 
Hopefully you can find someone closer than me to run a scan for you.
Elmer
Yer only 2 hours away! Hopefully you can find someone closer than me to run a scan for you.
Elmer
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From: JawJa
Last edited by GotVett?; Oct 7, 2011 at 03:55 PM.
