CEL p0171 & p0174 - diagnostic showed no failures.Runs fine. errors tho.

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I found my truck runs fine. The CEL comes on and it won't pass smog. Diagnostics couldn't find anything along with a smoke test. Possibly an internal gasket leak??? Possibly a weak fuel pump? It never dies or stumbles though.

Sultan91 in Las Vegas NV

Apr 11, 2012

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What are the best Ford repair shops?

RepairPal Certified shops can diagnose and repair your 2001 Ford F-150. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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CEL p0171 & p0174 - diagnostic showed no failures.Runs fine. errors tho.

What is your question?

Sultan91 in Las Vegas NV

Apr 11, 2012

1 Reply

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globalhelperon Apr 11, 2012

these are known for intake manifold gaskets leaking internally

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Popular Answer

What are the best Ford repair shops?

RepairPal Certified shops can diagnose and repair your 2001 Ford F-150. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.