Chevy Silverado 2008 2500HD Diesel Engine Power is Reduced - Diesel Bombers



Chevy/GMC Truck and Duramax Turbo Diesel Forum Discussion of General Topics related to All Chevy and GMC Trucks as well as the Diesels in them

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Old 09-02-2012, 08:50 PM
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Default Chevy Silverado 2008 2500HD Diesel Engine Power is Reduced

I'm new to the diesel arena, my brothers both drove diesel trucks for years and loved them. I finally traded in my gas 1/2 ton and bought a 2008 Chevy 2500HD diesel with 50k miles. I've had this truck for about 2 weeks and thoroughly like it, it's a beast. However last night I hooked my 20' trailer up and started to go down the road. About 10 minutes into the trip I noticed that my truck had no power, I looked down at the dash and saw a "Engine Power is Reduced". I was able to get ahold of a service department minutes before they closed, they said that the particulate filter was plugged, that I need to drive the truck for 15 minutes at 30mps and the truck will do a self cleanse. I drove for 30 minutes, no improvement. I swapped out the fuel filter this morning and went for a drive. The first 2 minutes were normal, then back to the engine power is reduced. I'm stumped... any tips? Thank you, Damon
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Old 09-03-2012, 04:40 AM
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any codes? codes don't aways make a CEL

dealers can force a regen with the tech 2 or you could get the exhaust temps up yourself. you could do this by running the engine hard for a while, pulling a trailer on the highway, driving at 30 mph for, not 15 min but 30 or more etc.

others may have better suggestions as i dont own a truck with a DPF so experience is lacking in this department
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Old 09-04-2012, 05:17 PM
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Just got it back from the dealer, they replaced the throttle position sensor, seems to be working properly now. Thank you, Damon
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Old 09-05-2012, 03:09 AM
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That will do it. Should have been at least one code though. Odd
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Old 09-06-2012, 08:27 AM
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Thats exactly what I would have done, brought it straight back to the dealer. I would also just take the DPF out anyways even if it wasnt clogged!
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Old 10-08-2012, 12:28 PM
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Default mass air sensor

Quote:
Originally Posted by damonsulli View Post
I'm new to the diesel arena, my brothers both drove diesel trucks for years and loved them. I finally traded in my gas 1/2 ton and bought a 2008 Chevy 2500HD diesel with 50k miles. I've had this truck for about 2 weeks and thoroughly like it, it's a beast. However last night I hooked my 20' trailer up and started to go down the road. About 10 minutes into the trip I noticed that my truck had no power, I looked down at the dash and saw a "Engine Power is Reduced". I was able to get ahold of a service department minutes before they closed, they said that the particulate filter was plugged, that I need to drive the truck for 15 minutes at 30mps and the truck will do a self cleanse. I drove for 30 minutes, no improvement. I swapped out the fuel filter this morning and went for a drive. The first 2 minutes were normal, then back to the engine power is reduced. I'm stumped... any tips? Thank you, Damon
Disconnect your mass air flow sensor , and see if it runs
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  #7  
Old 02-08-2016, 11:21 AM
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Default 08 duramax

I have an 08 Duramax with the LMM and on the dash display it says "Engine Power is Reduced" it wont drive over 5 mph! I had a code scanner ran on it and all the codes were P0101, P0102, P0571, P0678, P0113, P0299, P0546, and P0244B. Please help me figure out what these are and how/what I need to fix them ASAP!!!
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Old 02-08-2016, 05:34 PM
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looks like a bad ground to me. or maybe a loose connection on large bale connectors. did you check all of the fuses including the ones on the firewall?
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Old 02-08-2016, 06:49 PM
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did you recently do any work on your exhaust or upload any programmers?
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Old 02-09-2016, 07:47 AM
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I havnt tried any of the fuses and no, no work to the truck at all..bone stock
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