Question on codes p0202 and p2149 - Chevy and GMC Duramax Diesel Forum
04.5-05 LLY Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 12-05-2009, 02:07 PM   eBay Motors  #1 (permalink)
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Question on codes p0202 and p2149

Hi got a 05 3500 running really ruff and throwing 2 codes p0202. And p2149 any ideas
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Old 12-05-2009, 09:58 PM   eBay Motors  #2 (permalink)
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P0202:
Number #2 injector Drive fault, incorrect current on a fuel injector circuit (the condition exists for less than 1 second)... you should have freeze frame data with this one (operating conditions). The control module will disable the fuel injector with the concern. that'll be why it's running so rough. 2149 is a sister code set with it. Seems like the 2149 code is set to show the "set" of injectors will be disabled.. that is 4 cylinders that belong to your failed injector #2 so it probably shut down #3, #5 and #8 as well. It will turn off the lamp if the problem does not occur after 3 warm up cycles and drop from history if you have no issues for 40 warm up cycles. That's if it actually come right in the first place I guess!
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Old 12-06-2009, 08:57 AM   eBay Motors  #3 (permalink)
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The cheap fix is to use "Ice Pick" the injector connector-common problem!
I wrote this and saved it--That problem is usually caused by a loose connector at the injector. The cheap fix that will last, is to remove the connector, place it against something flat, and push a SHARP ice pick into both terminals. This will raise a dimple inside the connector for a better contact. Do this for #2 and #7 injectors. (The cylinders are numbered from the front--- passenger side- 1-3-5-7 and the drivers side is 2-4-6-8)

Also inspect the FICM harness at the alternator for shorts and wear-through. The harness is tied down with a zip tie, gets cut and shorts by contact with the sharp corner of the bracket.

These are common problems for the LLY engine. Everyone that has a LLY should know how to do this, and have a sharp ice pick in the glove box!
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Old 06-07-2014, 06:38 AM   eBay Motors  #4 (permalink)
 
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Originally Posted by jc1843 View Post
The cheap fix is to use "Ice Pick" the injector connector-common problem!
I wrote this and saved it--That problem is usually caused by a loose connector at the injector. The cheap fix that will last, is to remove the connector, place it against something flat, and push a SHARP ice pick into both terminals. This will raise a dimple inside the connector for a better contact. Do this for #2 and #7 injectors. (The cylinders are numbered from the front--- passenger side- 1-3-5-7 and the drivers side is 2-4-6-8)

Also inspect the FICM harness at the alternator for shorts and wear-through. The harness is tied down with a zip tie, gets cut and shorts by contact with the sharp corner of the bracket.

These are common problems for the LLY engine. Everyone that has a LLY should know how to do this, and have a sharp ice pick in the glove box!
push a SHARP ice pick into both terminals--- Do you mean from the side of the connector or from the top of the connector.
When i disconnect the battery and reset the ECM it runs good for some time after driving for some time the problem returns. I am wondering if the injector is bad it should be a hard code and the check engine light should come on as soon as i start the vehicle. Any suggestions will be appreciated.
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Old 06-07-2014, 07:39 AM   eBay Motors  #5 (permalink)
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FICM uses 2 separate circuits (banks) to fire the injectors.
If the wiring for any of the 4 injectors is compromised, all those cylinders will shut down and set code 2146--- or 2149.
Bank 1 => 1,4,6,7
Bank 2 => 2,3,5,8

It is NOT the injector-! GM has a repair connector-- also some part stores.
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