04 Duramax codes

cm1hedge

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My brother is looking at an 04 Chevy with the Duramax. It has codes P0073, P0100, and P0106. Any ideas, how hard would they be to fix, etc?
 

Dieselcrawler

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P0073 Ambient Air Temperature Sensor Circuit High Input

P0100 may mean that one or more of the following has happened:
The MAF may be disconnected, or a wiring connection may be bad
The MAF sensor may be faulty


The following could be symptomatic of a P0106:

Engine runs rough
Black smoke at tailpipe
Engine will not idle
Poor fuel economy
Engine misses at speed
CausesA P0106 could be caused by:

Bad MAP sensor
Water/dirt intrusion affecting MAP sensor connector
Intermittent open in the reference, ground, or signal wire for the MAP sensor
Intermittent short in the reference, ground, or signal wire for the MAP sensor
Ground problem due to corrosion causing intermittent signal problem
A break in the flexible air intake duct between the MAF and the intake manifold
Bad PCM (do not assume the PCM is bad until you've exhausted all other possibilities)
 
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