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 1,000 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!
  1. Home
  2. Questions
  3. 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: Fuel pump relay issue. 2000 Buick LeSabre

Hi there - the first rule of modifications is that when things stop working, you revert to the condition before the last change. In this case, remove power to the new stereo components, recheck your fuel fuses and the pump...

Q: Car won't start. Battery, starter & fuses ok. Suspect relay behind dash is there an easy way to access this relay?

The starter relay is located under the driver side speaker in the dash, mounted to the firewall. It may be possible to remove the speaker and reach the relay. If you are not comfortable with the repair or would like...

Q: Q: Cut off while driving

Based on the information you provided, it does seem like your clutch switch may be faulty. You may have another cause for the no-start. Read the DTC's (Diagnostic Trouble Codes) to determine if you have another component that needs testing....

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.