Skip the auto shop - Our mechanics make house calls

Q: The throttle position sensor has been replaced three times on a 2003 Buick lesabre. What is causing it to go bad?

asked by on

What keeps making the sensor constantly go bad. Should premium unleaded gas be used instead of regular unleaded gas like I've been using? The car shuts off while driving and then it over compensates and runs the engine too fast messing up the transmission shifting. What would cause the part keep going bad.

My car has 65000 miles.

Within conventional throttle position sensors there are metal contacts that sweep across a printed resistor board. Repetitive motion and vehicle vibration can cause these contacts to wear, over time, eventually causing sensor malfunction. If you are sure that the TPS itself, and not something else such as a loose connector, has failed in other like "repetitive part failure" scenarios, the best thing to do is buy the OEM GM part from the dealer. You should test the TPS and replace if indicated. If you want these steps performed by a certified Mechanic, dispatched by YourMechanic right to your location, please request a TPS sensor diagnostic/inspection and the responding certified mechanic will get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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!
  • Home
  • Questions
  • The throttle position sensor has been replaced three times on a 2003 Buick lesabre. What is causing it to go bad?

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: My windows keep fogging up and I have no idea why?

Claimed by Blake Griffin

Q: My car battery dead and the key is stuck in the ignition stuck on on and tried to jump it and it didn't work what do I do now

The fault with the battery should be resolved first. Once power is restored, the key will come out. There is an override function to remove the key (see vehicle owner's manual) but the underlying issue is your battery is dead....

Q: Check Engine Light Reappears

The mechanic that did the previous work and did a smoke test was doing the correct thing to detect the leak. The only thing is all the leaks were not identified. Have the vehicle tested again and make sure all...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.