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Duramax Second Generation: 2004.5-2005 (LLY) Discuss the second generation (2004.5-2005 LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion belongs in Third Generation forum due to the differences of the 2006 LLY and the 2004.5-2005 LLY. Engine related discussion ONLY. is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
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Old 06-17-2010, 10:41 AM   #1 (permalink)
Sparkplug Hunter
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Code0237and turbo bark

Guys, I have a 2005 GM SC with 4'" exhaust, s and b air filter and edje j/a. Over the past few months I have noticed the truck not being consistant when the turbo kicks in. The other day I decided to unhook the edge and see what codes i had. PO237 came up(Turbo Charger Sensor Circuit Low Voltage). I have made a date with the dealer, but last night I had to take the truck down the road and noticed the turbo was not kicking in at all and when the truck shifted, I heard a noise coming from the left side of the engine compartment. It was when it shifted into OD. Transmission shifted fine. Could this be turbo bark? What fixes for codes 0237?

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Old 06-18-2010, 10:39 AM   #2 (permalink)
Diesel Boss
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Might be something in the VVT sensor that is causing it not to close. Sensor is located on the top with the white wire protruding from it.

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