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08-15-2006, 04:11 AM
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Hummer Professional
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Join Date: Nov 2002
Location: dallas,texas,usa
Posts: 329
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wierd code
Driving down Lemmon Ave. here in Dallas, all of a sudden no power. I mean I can't go over about 5 miles per hour. On comes the check engine light and a code that says "reduced engine power". No **** Sherlock! I turn off the vehicle and turn it back on to recycle. Check engine light still on but I have full power. I make it to the dealer half a mile away. They give me an H3 loaner, call me 2 hours later and say all I needed was a software update. No charge. Whew! I thought the worst but all is well. Anyone else had " reduced engine power"? Scary.
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08-15-2006, 04:40 AM
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Hummer Authority
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Join Date: Nov 2002
Location: Wherever I Go, There I Am!
Posts: 1,216
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Re: wierd code
Make sure you hear the gas cap click Every Fill up also!  ...can get an engine light if loose!  |
08-15-2006, 04:45 AM
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Hummer Professional
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Join Date: Nov 2002
Location: dallas,texas,usa
Posts: 329
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Re: wierd code
Yeh, I've had that but never a loss of power.
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08-15-2006, 06:34 AM
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Hummer Messiah
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Join Date: Nov 2002
Location: PDX
Posts: 2,367,817
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Re: wierd code
Quote:
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Originally Posted by Big Z
Make sure you hear the gas cap click Every Fill up also! ...can get an engine light if loose! |
X2
I just went through that again.  I hate Oregon's no self serve gas law.  |
08-15-2006, 07:18 AM
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Hummer Messiah
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Join Date: Apr 2003
Location: Virginia Beach
Posts: 37,474
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Re: wierd code
Quote:
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Originally Posted by Big Z
Make sure you hear the gas cap click Every Fill up also! ...can get an engine light if loose! |
That's the FIRST thing I've always been asked to check when using OnStar. GM needs to fix that problem. 
__________________
"My reading of history convinces me that most bad government results from too much government."---Thomas Jefferson
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08-15-2006, 11:00 AM
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Hummer Guru
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Join Date: Jul 2005
Location: Idaho
Posts: 4,744
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Re: wierd code
You guys are getting reduced power with the fuel cap off? After a set time it is supposed to set a vapor leak code and turn on the light, but I have not heard of a reduced power mode.
Next time the programmer is over I'm going to have to check with him on that one. 
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Black Sheep Hummer Squadron
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08-15-2006, 11:25 PM
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Hummer Professional
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Join Date: Nov 2002
Location: dallas,texas,usa
Posts: 329
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Re: wierd code
My problem was not a fuel cap issue. At first we thought alternator, but it was a software glitch known to my Tech and he merely uploaded new software.
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08-15-2006, 11:29 PM
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Hummer Veteran
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Join Date: Aug 2006
Posts: 119
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Re: wierd code
I had the code come on by my gas cap being loose. also by losing all power sounds like you cat conv. is bad, I replaced one at 50000 miles. vehicle lost all power would only go 5 mph, not sure when the warranty runs out, but it was still good for the cat conv at 50000 miles
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08-15-2006, 11:43 PM
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Hummer Guru
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Join Date: Jul 2005
Location: Idaho
Posts: 4,744
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Re: wierd code
Converter warranty is different between states. It should be in the owner's manual what the warranty is for each particular state.
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