Having problems with your 1998 Ford Expedition ?

Check Engine Light

\015 What do codes PO171 and PO174 mean?\015 Posted / edited by AnonymousUser on : 19-02-2018

Answers :

I had the exact same codes on my 2000 Navigator with a 5.4L eng just today. It was a vacuum on the top of the motor. The hose had deteriorated and caused an associated hissing sound and rough idle. Used a little duct tape, ops check good, no return faults.
My steering column is no good
Repair Help & Product Troubleshooting for 1998 Ford Expedition

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