Ford Enthusiast Unofficial Resource

Go Back   Ford Forum - Enthusiast Forums for Ford Owners > Ford Trucks, Ford Vans & Ford SUV's > Ford Ranger
Sign in using an external account
Register Forgot Password?

LinkBack Thread Tools Search this Thread
Old 11-08-2009, 08:24 PM
Junior Member
Join Date: Jan 2007
Posts: 3
Default Trouble Codes 171 & 174 - causing me trouble

I'm having fits with the check engine light. My 2000 Ranger is showing DTC's 171 and 174 which indicate that the engine is running lean. I subscribe to Alldatadiy online diagnostic service and have run their suggested tests to no conclusion.

I checked all hoses, fittings and gaskets for leaks - found none
Tested fuel pressure - it's Ok
Mass air flow sensor - appears OK

Here is the strange thing that I am finding. I have an engine scanner and it indicates that the barametric pressure sensor is reading much lower than it should (22 in Hg as oppose to 30 in Hg). They have a specific test to do on this sensor but I'll be dammed if I can find it. Alldatadiy gives not-a-clue to where to find it.

Does this truck have a separate barometric pressure sensor or is it part of some other part or sensor? Anyhelp with this would be greatly appreciated.

Any thought on what to check to fix these code would also be appreciated
Reply With Quote
Old 11-08-2009, 08:24 PM

171, 174, 2000, code, codes, engine, escort, expedition, f150, ford, obd, ranger, service, taurus, trouble

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Our Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 11:25 PM.

© Internet Brands, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.