× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 97, 98, 99 FORD EXPLORER 4.0 DTC'S PO171 AND PO174.
Posted to Technical Discussion Forum on 12/25/2003

John:

Merry Christmas!

We've had several fords with these codes. As the other members have stated, there is a TSB on leaking O-ring seals in the upper intake. Usually, not a big deal to replace... just some practice. The biggest obstacle is disconnecting t... Login to read more.