Preliminary info: 1999 Ford Ranger original owner 124,500 miles on 4 cylinder motor. Motor is all original and has never had any work done to it except normal maintenance and the one thing that went on it about a year ago is the sensor that makes the truck shift gears in the automatic transmission. that sensor was replaced
Now the last few weeks the truck has a new trick sometimes the check engine light will come on and stay on for a few days. the first time it happened it went off by itself ( i never took any action to reset the light) before i got a chance to have the codes read
second time it happened i brought the truck to my sons job where he has a code reader and the following two codes came up :P0122 which comes up on his code reader as TPS low input sensor A circut and P1120 Fuel Air metering control.
I had my son reset the computer with his scan tool and the light stayed out for almost two weeks and when i went on a long trip last weekend it came on on Sunday when i was returning from maryland. It stayed on for the last four days when all of a sudden it went out.
I went to Ford and two dealerships want to charge me $400 to test the system and all and replace the TPS and i kinda felt i was getting taken here So my question is what do yall suggest? Does anyone have any idea as to where the tps is exactly on this truck? and any pics of this? thanks in advance
Bob

 

It should be located on the throttlebody, if your going to replace it you'll be able to find it once you have the new one.

 

99 ranger bob,

This should help you out, even though it's for a V8 engine.

http://www.f150online.com/forums/sho...=voltage+check

-hooD