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The tenth generation Ford F-Series is a line of pickup trucks that was produced by Ford Motor Company, it was sold from the 1997 to the 2004 model years.

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Check engine light on

PO171 PO174 error codes

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Hi @markschoepke

The codes indicate a fuel too lean in Banks 1 & 2 problem.

This is usually either an airflow problem (too much air) or too little fuel getting to the engine.

Here's a video that shows how to check if the MAF (mass air flow) sensor is OK or not.

If it's a fuel problem it could be a clogged fuel filter or a fuel pump problem - low pressure

Hopefully a start to find out what's wrong.

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mark schoepke will be eternally grateful.
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