My 97 ford F350 continues to give me codes of po122 and po221. I have replaced the throttle positioning sensor three times.

The throttle position sensor requires callibrating with the specific service tool.

TPS sensor control trans ,check for anything there for damage .

code po122 is for your throttle position sensor. po155 is for your down stream o2 senor .po135 is for your bank 1 sensor 1 o2 sensor. po102 is for your maf sensor

The code is for a problem with the throttle position sensor circuit.
The sensor would need to be tested with a meter and possibly replaced.

trottle position sensor is on the trottle body opposite the throttle cable

that's Throttle position sensor that's causing the code to pop. The TPS is a little rheostat that moves when you step on the gas pedal. After a while (continuous back and forth movements over all the many miles) it develops "hot spots" that don't read as they did when new. Yours has finally gotten really weak and needs to be replaced. Hope that helps

there is no adjustment on these tps's it's a drive by wire system. If you don't know the vehicle, dont post!
there's 2 sensors contained in the pedal sensor, and one on the throttle plate shaft, more often than not, it's the pedal sensor, and if you replaced that, it's the other one or a loose connection. did you reset the computer after replacing the pedal?

Throttle/Pedal Position Sensor/Switch "B" Circuit Range/Performance

po341 is camshaft position sensor A bank 1 ckt range/perf and po122 istps/pedal position sensor A curcuit low input this is throttle position switch on side of throttle body!

I have a ford taurus 2000 and it gave me this codes PO171,PO174,P1504 The car rus good for 20 t0 30 minutes and the car in the stop signs and light turns off but turns back on fast but turns off fast too but it runs good