Skip the auto shop - Our mechanics make house calls

Q: Throttle position sensor - 1994 Ford F-150

asked by on

I replaced my throttle position sensor today and after installation my engine threw the code(s) 122, 998. In the manuals that I have it reads code 998 as a hard fault present, while code 122 is tp sensor circuit below minimum voltage. I checked the wiring and don't see any breaks or cuts so im not entirely sure what is going on. Thanks in advance for the input.

My car has 136000 miles.
My car has an automatic transmission.

A: Hello. The only thing to do is to verify th...

Hello. The only thing to do is to verify that the TPS was installed in the correct position. Make sure you did not put the little blade on the throttle body behind instead of in front of the sensor blades. If you have it on wrong, then the voltage will be too low and give your the codes you received. If you still need help, then have a mechanic diagnose the cause of the codes and proceed with the proper repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Power windows not working

If both sides are not working, and they stopped working at the same time, here's a couple things they share. Check the 20amp circuit breaker in the fuse box. You can pull it out and pop a 20amp fuse in...

Q: Display isn't working, says a/c isn't connected, engine just lost power- but a/c, radiator, oil, gas, intake are all connected.

That sounds frustrating. You will need to get your car scanned using a scan tool that communicates well with a Prius. This will identify the diagnostic trouble codes (DTCs) that you can use to begin your diagnosis. You can...

Q: Lack of response when stepping on the gas.

Your engine has a couple sensors that can cause the symptom you talk about.You should have the computer scanned for codes first and then the datastream can be looked at to see if the computer is losing input from the...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...