3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

P 038...

Old 06-14-2018, 10:27 AM
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P 038...

Towing 6500 lb trailer. When in tow haul with cruise set at about 64 when it downshifts on a long hill and pulls and then shifts back I get a check engine light. My cheap auto zone reader shows a P038. Truck seems to be running fine and getting good milage. Any ideas or suggestions. I am in the middle of a very long trip and would like to know if something is going amiss that can be fixed.
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Old 06-14-2018, 01:42 PM
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Are you sure that is the right code and not P0038?
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