Question about 2000 Chevrolet Blazer

How do i fix my 2000 blazer for DTCs p0171 and p0174

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249 Answers

Your mass airflow sensor could be dirty,on my daughters truck it had both those codes and it was a vacumn leak on the upper intake plenum gaskets ,found that out after replacing the maf sensor twice ,sensor is expensive ,i'd try cleaning it with an electrical cleaner that doesn;t leave a residue,

Posted on Jan 05, 2010

Testimonial: "i had to have the thermostat replaced this morning, they said it was tricky because they had to remove my intake they may have left it a little loose."

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90 Answers

Check you MAF sensor it may need to be cleaned, also look for intake leaks

Posted on Jan 05, 2010

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