Skip the auto shop - Our mechanics make house calls

Q: Throttle Position Sensor replacement - Re-learn Needed?

asked by on

So I got a new throttle position sensor. And the code p0120 keeps showing up and I cant get rid of it. The car will start sometimes but when I give it too much gas it will sputter and stall. Also, when I put my car in drive or reverse it will idle at 1000+ rpms and already want to start going. In addition to when in drive, it idles up and down and up and down until i put it in park then it idles fine. Its a brand new sensor. Can you give me a list of things you would do to fix it please? Im short on money right now and I need this fixed so I can go to work.

My car has 200000 miles.
My car has an automatic transmission.

A: Hello - there is a step missing in your thr...

Hello - there is a step missing in your throttle position sensor replacement, and that is the "re-learn" procedure. This step allows the engine computer, transmission controller and other components of engine management to "learn" the specific behavior of the TPS you just installed. Performing this process, which is often different for each manufacturers engine/transmission combination, will eliminate the bad behavior you are currently experiencing with your vehicle. If you need assistance, I would recommend having a mobile, professional mechanic, such as one from YourMechanic, perform a throttle position sensor service. They will come to your location, complete the installation and "re-learn" process, and get you on your way.

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

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: Squeaking when you hit a bump in the road

You should check the sway bar bushings and links. You can do so by having someone bounce the car up and down and have the other person feel them by hand. You will be able to feel squeaking part. ...

Q: The problem I'm having is overheating and then water starts to come out of the overfill hose on the reservoir.

Hi there. If you have removed the thermostat and the engine still overheats, then there could be an issue with the water pump or the head gasket. With the engine running at operating temperature before it gets hot, check the...

Q: Check Engine Light is on. Car idles high when put in drive or reverse and engine stalls when too much gas is applied.

Is there also a loud hissing or sucking noise and maybe a lean code stored in the engine control computer? The high idle sounds like there may be a problem with the idle air control valve or there may be...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.