3rd Gen Engine and Drivetrain -> 2007 and up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

P0306 Code

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Old Mar 15, 2008 | 03:11 PM
  #1  
myfirsttruck's Avatar
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From: Kingston Ontario
P0306 Code

Have P0306 but NO CEL. Found it when I cycled the key just for fun. Cleared it off with the code clearer, started back up - no CEL but P0306 came back.

Any ideas?
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Old Mar 15, 2008 | 03:25 PM
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TreeFarm's Avatar
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From: The South
P0306 = Cylinder #6 misfiring.

Possible causes:

LOW FUEL
OTHER DTC’S
DAMAGED FUEL LINE
VALVE TRAIN
OBSTRUCTED FUEL INJECTOR SUPPLY LINE
DAMAGED OR OBSTRUCTED HIGH PRESSURE CONNECTOR
EXTERNAL DAMAGED FUEL INJECTOR
INTERNAL DAMAGED FUEL INJECTOR
NO COMPRESSION
EXCESSIVE ENGINE LEAK DOWN

The above is for an '05. I assume it is the same for other years.
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Old Mar 15, 2008 | 05:10 PM
  #3  
porkchop2245's Avatar
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From: hurlock md
it is the same for the 6.7s sounds like you need to take her back to the shop
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Old Mar 16, 2008 | 07:06 AM
  #4  
myfirsttruck's Avatar
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From: Kingston Ontario
If its that serious, why no CEL coming on?
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