Codes 121 and 125, should I replace TPS?

[BlueOvalStangGT]

I pulled codes the other day and got the following:

121: TPS is out of self test range
125: TPS voltage lower then expected

The car runs like ****, doesnt idle and doesnt got WOT. Should I replace the TPS? Probably right?

 

[HISSIN50]

What is the TPS reading at idle?

Something might have worn or come out of adjustment (like a wandering throttle stop screw) and this caused a low reading. If the signal return is below about .80 volts at idle, it should pop an adaptive limit code like you're seeing. I'd adjust my old one before buying new, but buying new is always an option.

Good luck Keven.

 

[BlueOvalStangGT]

Just checked it with the Tweecer .965 at idle and 4.707 at WOT. My KARMFs are WAY off though, like 1.2XX Could that cause large amounts of stalling at lights/no idle and bucking/not WOT power at WOT?

 

[S/CBlack95GT]

Id toss a new TPS on it since that is what the codes are telling you. If that doesn't fix the problem then you can take it from there.

 

[BlueOvalStangGT]

Kept it and I while I was polishing a few things, I found a massive exhaust leak....car runs great now.

 

[GTA_V6_Mustang]

Massive exhaust leak where? Plus I didnt know that could cause a TPS code.

 

[mo_dingo]

It might have been an old code stored possibly

 

[BlueOvalStangGT]

Yes and no, before I fixed the exhaust leak the check engine light would come on probably 3 times every time I drove to work. Now that I fixed the exhaust leak, it hasnt come on since....probably coincidence but its the truth!

 

[BlueOvalStangGT]

And one of my number 4 header bolts came loose....leaked through there.