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Gary
Gary, Chevy Technician
Category: Chevy
Satisfied Customers: 17146
Experience:  15 years GM master tech
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2003 Chevy 2500hd 6.0 sometimes rough idle check engine

Customer Question

2003 Chevy 2500hd 6.0 sometimes rough idle check engine light flashing code p0171?
Submitted: 9 months ago.
Category: Chevy
Expert:  Gary replied 9 months ago.

Welcome! My name is ***** ***** I will do my best to assist you with this problem.Ask me about added features such as phone contact anytime if you wish !

Expert:  Gary replied 9 months ago.

has anything been done yet to correct this problem yet ?

Customer: replied 9 months ago.
Nothing has been done yet.
Expert:  Gary replied 9 months ago.

how does it run ?

at idle ?

driving down the road ?

Customer: replied 9 months ago.
Down the road fine. Hasn't done this at all today drove probably 30miles today. Happened yesterday after returning home from a 200mi trip.
Customer: replied 9 months ago.
Then I shut off got reader after bout 30min plugged in started it only code was p0171.
Expert:  Gary replied 9 months ago.

a 171 is a lean code usually

this is caused by lower intake manifold gasket leaks or dirty MAF sensors or low fuel pressure

make sure there are NO vacuum leaks if not then clean the MAF and see if that helps at all

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