truck went into "limp mode", and I need help. - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 05-23-2009, 06:16 PM
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jbizzle jbizzle is offline
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truck went into "limp mode", and I need help.

I'm raged..

Well guess what the **** happened to me.

Drove up to Green bay yesterday to pickup my new car (2006 Trailblazer SS) .. 10 minutes before we get there, my car decides to **** up. "Reduced engine power" wont go over 20-30mph, slept in the car overnight at a rest stop. Went to a GM dealer today (took about 1 hour to get there, only 10 miles away) stayed there for a few hours.. couldn't figure it out.

We were driving back home going 20-30mph, finally we meet up with our tow truck.

Just got back home, and i'm raged.

I don't think god wants me to get that car.

Any ideas on what happened? How can we fix it?

Only thing we did was take out the HO alt, and swapped batteries, and when we went to go start the car, both my low beam headlights were blown.
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  #2  
Old 05-23-2009, 06:57 PM
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lynch55 lynch55 is offline
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Hey man I'm sorry for your luck, but hindsight maybe you shouldn't have removed HO alt. or battery?
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  #3  
Old 05-23-2009, 07:00 PM
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jbizzle jbizzle is offline
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I believe its the throttle position sensor, as what our scanner says.. and no one seemed to have it in stock in WI, so no SS for me
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  #4  
Old 05-23-2009, 08:18 PM
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Hard to believe the dealer couldn't find the TPP sensor code in memory. Anyway, a failure of one of the two redundant sensors is cause for the REP limp-home mode, since GM never wanted the drive-by-wire vehicle to be in a position that a single failure could result in a WOT condition. Rarely, depending on the code, the fault could actually be in the harness or the internals of the fan clutch. Is your 2002 fan clutch the original, or did you ever replace it over the years?

On the low beam issue - are you certain the bulbs are burned out? It could be a simple failure of the DRL relay module or a fuse. You could swap as an experiment with the identical fan relay module (both black) next door to it.
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Old 05-23-2009, 09:03 PM
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Quote:
Originally Posted by the roadie View Post
Hard to believe the dealer couldn't find the TPP sensor code in memory. Anyway, a failure of one of the two redundant sensors is cause for the REP limp-home mode, since GM never wanted the drive-by-wire vehicle to be in a position that a single failure could result in a WOT condition. Rarely, depending on the code, the fault could actually be in the harness or the internals of the fan clutch. Is your 2002 fan clutch the original, or did you ever replace it over the years?

On the low beam issue - are you certain the bulbs are burned out? It could be a simple failure of the DRL relay module or a fuse. You could swap as an experiment with the identical fan relay module (both black) next door to it.
Pretty sure its original.

Yes they're burned, I replaced them and they work fine.
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  #6  
Old 05-24-2009, 05:52 PM
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anyone else?
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  #7  
Old 05-24-2009, 06:07 PM
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Your thread title isn't one that grabs people and gives them a hint that you're anything but "raged".

I assume you have the sensor on order, or are you waiting for some ratification first?
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  #8  
Old 05-24-2009, 06:20 PM
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MajesticLT03 MajesticLT03 is offline
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fixed the title somewhat...
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  #9  
Old 05-24-2009, 06:32 PM
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Oh, *I* could have done that.
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  #10  
Old 05-24-2009, 10:24 PM
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Well I want to know what could have caused it, and if its the sensor for sure.

We hooked it up to a snap on computer, and it says throttle position sensor, so I'm assuming that's it..?

GM dealer said it could be the computer OR the sensor.
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