reduced engine power
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reduced engine power - 10/6/2007 1:58:07 PM
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H2
Posts: 16
Joined: 9/20/2007
Status: offline
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i had my reduced engine power displayed on my dash. has any came across this problem and if so whats the problem? what part needs to be replaced? can anybody being mechanically incline replace or is it a dealer problem? thanks for the help
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RE: reduced engine power - 10/6/2007 3:32:34 PM
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dizzy
Posts: 271
Joined: 9/26/2006
Status: offline
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Does the truck run ok? Is the check engine light on? I know that some vehicles will go into some sort of limp mode to get you home if a problem is detected.
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RE: reduced engine power - 10/6/2007 3:34:39 PM
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blackstangs281
Posts: 6826
Joined: 11/13/2005
From: Pittsburgh PA
Status: offline
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Is it still under warranty?
Get it to the dealer, it could be a number of different things
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RE: reduced engine power - 10/6/2007 4:01:01 PM
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Muddydawg75
Posts: 9960
Joined: 3/11/2007
From: South Jersey Shore
Status: offline
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RTFM....
Reduced engine power on the DIC is due to engine overheating.... Check the coolant first....
Did you happen to look at your temp guage when it went into that mode?
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Graphics by HUMMER DRIVER
"I feel sorry for people who don't drink. When they wake up in the morning, that's as good as they're going to feel all day." --Frank Sinatra
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RE: reduced engine power - 10/7/2007 6:01:06 AM
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hilljob26
Posts: 2069
Joined: 9/2/2007
Status: offline
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maybe somebody should make a chart,like showing what would be the first thing to check when a certain message pops up
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RE: reduced engine power - 10/7/2007 8:08:31 AM
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Doc Olds
Posts: 3811
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline
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Hilljob's making a chart! Sweet. 14G metal chart with knurled edges!!!! I think O Manuals have some charts? So H2 post back w/ an update.
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RE: reduced engine power - 10/9/2007 11:11:44 PM
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3hummers
Posts: 11822
Joined: 9/23/2007
Status: offline
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If you are signed up with Onstar they can run a diagnostic for you and tell you what is going on with the truck.
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2006 H1 Alpha wagon
2000 H1 Slantback
1997 H1 wagon
2008 H3 Alpha
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RE: reduced engine power - 10/10/2007 3:45:00 PM
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Muddydawg75
Posts: 9960
Joined: 3/11/2007
From: South Jersey Shore
Status: offline
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If it wasn't actually overheating there is a possible fuse that is bad.... I cannot find where I read what one yet...
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Graphics by HUMMER DRIVER
"I feel sorry for people who don't drink. When they wake up in the morning, that's as good as they're going to feel all day." --Frank Sinatra
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RE: reduced engine power - 10/11/2007 7:33:51 AM
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GorillaH2
Posts: 1413
Joined: 7/30/2007
Status: offline
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Did you take it to the dealer yet?
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RE: reduced engine power - 12/6/2007 6:13:26 AM
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Stryder
Posts: 48
Joined: 2/4/2007
Status: offline
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I had this happen last night.
It was -24'C, and I was coming out of work. I went to start the H3, and when I turned the key, nothing happened. I initially thought my battery was dead.
I turned the key to "off" and tried again. This time, it started, but immediately stalled after running rough. I started again, this time giving it some gas. After I let go of the pedal, it stalled. I tried again, and this time it stayed running, but very very rough, with RPMs ranging from next to 0 all the way to 1200. Several failures were reported, including:
- Reduced Power
- Stabilitrak Failure
- Service Engine
I called OnStar. They patched me into an expert because they said it was very serious. He said something about throttle body, accelerator sensor, and some others. He said I shouldn't drive it. He patched me into the dealer (who was closing in 10 minutes). The dealer said no point in bringing it in as they were closing, and recommended I try and drive it home. I started driving, but using the accelerator didn't do anything (all I got was a crazy up/down idle speed). He suggested I pull over, and shut it off, wait 30 seconds, and re-start it. I did that, and it seemed to start fine, but the errors were still reported.
We'll see what the dealer says. I've sent them an email this morning to get it booked in for service.
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Winnipeg, MB, CANADA
'06 H3, Black inside/out, leather, sunroof, automatic, DVD nav.
I have used Mac OS 1.1-X (all versions), Windows 3.1-Vista (all versions), OS/2, Linux, Darwin, Commodore 64, BeOS. Are you hiring?
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RE: reduced engine power - 12/6/2007 6:50:34 AM
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IHNEVELS
Posts: 320
Joined: 9/19/2007
From: Baton Rouge La
Status: offline
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Had one of my chevys do the same thing last week. would start and die as if the fuel pump was failing and would run very rough up to about 2000rpm then smooth out and as soon as gas was released it would die. turned out it was the crank shaft positioning sensor. runs great now.
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RE: reduced engine power - 12/6/2007 8:27:00 AM
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eddymac36
Posts: 7
Joined: 5/8/2007
Status: offline
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This happened on my H2 once. It turned out to be a bad throttle position sensor. The dealer fixed it very fast for me.
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RE: reduced engine power - 12/6/2007 9:23:55 AM
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popocamaro1
Posts: 114
Joined: 7/28/2007
From: Baghdad(Augusta,Ga)
Status: offline
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I didnt read anyones responses forgive me, but our 6L suburbans we use on missions here get it all the time. We usually get half power instantly when it flashes reduced engine power. Once was because a sensor for the engine temp was on the fritz another time it was something with the throttle position sensor and once was because the computer itself went bad. We get it all the time over here most of our suburbans dont even have 30k miles on them and they go through all this hell. Our master GM mechanic always has no problem hooking it up to the computer & diagnosing it. For most though it is a temp issue.
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RE: reduced engine power - 12/7/2007 5:42:20 AM
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Stryder
Posts: 48
Joined: 2/4/2007
Status: offline
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It started fine yesterday morning, and the engine lights went out. I called the dealer, and they suggested that it would be a waste of time to bring it in, because if the engine light isn't on anymore then the error codes have been cleared by a "self-diagnostic".
He said (which makes sense) that some moisture probably got into the throttle body and when it froze the other day, it stuck the throttle into a particular position. The computer was trying to open the throttle and it was frozen, and that's what made it run rough. Once the engine warmed up (and I shut it off to reset it), it ran fine, which (to him) indicated that the ice in the throttle had melted.
_____________________________
Winnipeg, MB, CANADA
'06 H3, Black inside/out, leather, sunroof, automatic, DVD nav.
I have used Mac OS 1.1-X (all versions), Windows 3.1-Vista (all versions), OS/2, Linux, Darwin, Commodore 64, BeOS. Are you hiring?
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