I asked earlyer about p1537 manifold control bank stuck open number 1 if it would make you have bad gas mileage its a ford ranger 2002 2.3 it runs good I can fill it up and get 150 miles but runs good

SOURCE: check engine light on code 171and 174

Sounds like a dirty Mass Air Flow sensor.

Dave C

• 1050 Answers
• Posted on Apr 05, 2009

SOURCE: I have a '96 Ford Windstar 3.8L & getting OBDII P1537 code.

A common problem on Windstars, there are two IMRC valves, the only way to fix them is replacement, which is not that hard. They are mounted on the end of the intake manifold and control runner length. There is a front and rear one, I'm not sure which one this is but you'll probably have to go to Ford to buy it and they should be able to tell you with the code number. The problem will not affect driveability that much, but if you have emissions testing at your location, this will likely cause it to fail.

SOURCE: how to fix a intake

You replace the Intake Runner Manifold Control, (Valve) that is worn, bad, sticking etc. Most likely a vacuum leak Check vacuum hose to it first.Then buy at Auto Parts Store and do yourself. Dealer Part,only if not avail on internet or auto parts.

SOURCE: P1537 Trouble shoot code Intake Manifold Runner

im having the same problem did you find out hoow to fix it

SOURCE: trouble code p1537 on my 01 ford ranger manifold

It controls the length and speed of incoming air for a certain engine rpm to optimize swirl, efficiency, and minimize knocking.
Most likly you have a vacum leak
check all vacum lines to the intake manifold
check to see if the are cracked burned or just not hooked up
I hope this helps give me feed back and good luck.