P171-174 code on Exp 98
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P171-174 code on Exp 98
Hi there,
I just signed in to this cool place.
my exp 98 is showing a 171 -174 codes. the MAF sensor is cleaned and good. Iddle is really bad when cold and runs ok when opp temp is reached.
could the EGR be bad? already checked ECT, leaks on manufold.
any ideas?
thanks
I just signed in to this cool place.
my exp 98 is showing a 171 -174 codes. the MAF sensor is cleaned and good. Iddle is really bad when cold and runs ok when opp temp is reached.
could the EGR be bad? already checked ECT, leaks on manufold.
any ideas?
thanks
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If you get a minute check out the link here, it will help you to navigate around and understand this site.
https://www.ford-trucks.com/forums/s...d.php?t=300691
We are happy you have chosen the best source for Fords!
Enjoy FTE and The State Chapters are located at the bottom of the main forum page.
JOIN CLUB FTE -SUPPORT THE FORUMS!
See you on the boards.
….
New User
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I played this very game with my 01 expy this weekend. I replaced MAF, checked all vac lines, intake leaks etc, then got hit with the stupid stick. 2 weeks ago when I replaced the plugs, I had inadvertantly knocked the PCV valve loose, and did not see it. Plugged it back in and its good to go. Check and make sure it aint loose, also check it where it hooks to intake, just feeling of it yesterday, it seems it would be hard to detect a leak.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
The cause of a P0171 & P0174 on the EXPY/Navi is the same as the F-150 - Vacuum leak!
Inspect that stupid PCV hose (both elbows) - they're the most common problem.
More info, SEARCH keyword "P0171 P0174" in this and the 97-03 F150 Forum.
Steve
Inspect that stupid PCV hose (both elbows) - they're the most common problem.
More info, SEARCH keyword "P0171 P0174" in this and the 97-03 F150 Forum.
Steve
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