2008 Colorado 3.7 - Throttle Body Issue/ECM Issue - Chevy Colorado & GMC Canyon

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Old 01-11-2014, 04:44 PM   #1 (permalink)
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Default 2008 Colorado 3.7 - Throttle Body Issue/ECM Issue

So my truck has the same issue where all of a sudden the 'engine reduced power' message comes on and my truck begins to get jerky.

My local auto parts store gave me the trouble code p2135
Repair Electronic Control Module ECM wiring
Replace Throttle Body
I want to go the first option and repair the wiring... harness I'm guessing... but where and what exactly should I buy.... I called the dealer because my local store said it was a dealer only part and they told me $600+ for the part.

Can anyone give me more insight ... also I will post a picture below so someone maybe can point out to me the wiring / harness

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2008 Colorado - Imgur I'm guessing the wiring leading from the throttle body to the center harness is what I need to replace?
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Old 01-11-2014, 05:13 PM   #2 (permalink)
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Start with cleaning the throttle body and MAF Sensor first and see if that helps.

HOW TO: TB (Throttle Body) Cleaning (WITH PICS!) - UPDATED

The seafoam part isn't important right now. Just follow the procedure for MAF Sensor and Throttle body. It will only cost you 2 cans of spray cleaner.
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Old 01-11-2014, 06:13 PM   #3 (permalink)
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Did the Throttle Body thing before ... going right now to buy some MAF Cleaner... I don't have any... I'll touch back with updates.

Thank you for the link!

Also, I changed out all my spark plugs yesterday and the third one looked really bad.. is this normal?

Edit: Bad as in corroded and much darker than the rest...

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Originally Posted by 08Canyon View Post
Start with cleaning the throttle body and MAF Sensor first and see if that helps.

HOW TO: TB (Throttle Body) Cleaning (WITH PICS!) - UPDATED

The seafoam part isn't important right now. Just follow the procedure for MAF Sensor and Throttle body. It will only cost you 2 cans of spray cleaner.
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Old 01-11-2014, 07:58 PM   #4 (permalink)
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Update:

So I've cleaned my MAF Sensor and put everything back to normal with a battery reset as well.

Let it sit idle for probably about 10 minutes and it did the same thing... started to get jerky and same trouble messages on the odometer... Anything else I should do?
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Old 01-11-2014, 08:51 PM   #5 (permalink)
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I don't think it would be a defective ECM harness.

P2135 Chevrolet Throttle/Pedal Position Sensor/Switch 'A'/'B' Voltage Correlation OBDII Engine Light Trouble Code | Engine-Codes.com
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Old 01-12-2014, 10:30 AM   #6 (permalink)
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So is my next step to just buy a new throttle body?

I read up on the link you provided and see another link inside on how to take apart the TP Sensor... that seems risky and some of the tools it mentions in there I don't have.

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Old 01-12-2014, 01:39 PM   #7 (permalink)
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What am I missing here?

After reading the referenced bulletin, It looks like a bad TPS Throttle Position Sensor or the connection to it. I have never replaced one on a Colorado but usually they just bolt on and cost about $40.00 or less.

Am I mis-reading something here?
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Old 01-14-2014, 11:20 AM   #8 (permalink)
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RiAcirca84,


Hello! I understand that you are seeking advice on how to resolve this vehicle issue your self. I might not be able to give you any technical advice but I am more than happy to look into this concern for you. Please private message me if I can be of any assistance.


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Old 01-17-2014, 12:25 AM   #9 (permalink)
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Replaced throttle body... all is well... so far...
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RiAcirca84,


Hello! I understand that you are seeking advice on how to resolve this vehicle issue your self. I might not be able to give you any technical advice but I am more than happy to look into this concern for you. Please private message me if I can be of any assistance.


Jennifer T.
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Old 01-21-2014, 12:04 PM   #10 (permalink)
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RiAcirca84,


That is great! I am happy to hear that your vehicle issue has been resolved. Please know that GM Customer Care is here and happy to assist.


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