Code p0122
Dead pedal sometimes service engine light on

Bought new sensor, installed it now severice engine light stays on and the pedal is completely dead.
So I put the old sensor on for now since it works most of the time.
Part number for the sensor I put on it F4SZ 9B989 AA

Is there a different sensor I need?
Or do I have to replace the whole pedal assembly?

 

What year? I have a 99.5 and just dealt with this. I wound up buying the whole assembly.....


I got an oem one from a ford dealer on ebay for $220.

The first thing to do is to take the pedal assembly out(it's only 3 bolts and two connectors) and clean the switch and the sensor with some contact cleaner. This worked for me for over a year.




While you have the assembly out, check the part number of the TPS thingy. If it is PN - F81Z-9F836-AB, then you can get an oem ford one(the entire assembly) here:


http://www.ebay.com/itm/231269309848?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Looks like the price has increased since i purchased mine, but this is still the best deal going on the OEM parts. I just swapped out the entire assembly, took the old sensor and IVS out, cleaned them up and tossed them in the glove box along with my extra cps and clutch pedal bushing.

Note that you can buy the position sensor from napa/dorman/etc, but I found nothing but negative experiences when i was researching.

Good luck!

 

Try reinstalling the TPS.

Disconnect Battery
Install TPS
Rec-connect Battery
KOEO (DO NOT START)
Clear Codes
Clear KAM
Cycle Key Off/On
Start Truck
Allow 15 - 30 seconds.
Drive Vehicle

 

I wish that would have worked, but it didn't.
Thanks though

 

You may want to return that defective part.