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EricFromCT, Ford Technician
Category: Ford
Satisfied Customers: 3964
Experience:  20 years dealership exp., ASE A1-A9 L1 L2, Ford Lincoln Mercury Senior Master, Diesel Certified
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Lurch I have a 1997 F150. code bank po171 bank 2 po174. run

Customer Question

hi lurch I have a 1997 F150. code bank po171 bank 2 po174. run rough in idle. converter red hot. can you help. Thanks
Submitted: 2 years ago.
Category: Ford
Expert:  EricFromCT replied 2 years ago.

Hi. Generally p0171 and p0174 are first caused by a vacuum leak. If no vacuum leaks can be found, you will want to check the fuel pressure. Low fuel pressure will set lean codes as well.

Expert:  EricFromCT replied 2 years ago.

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