Melanie Reiff
Updated on Aug 11, 2022
A mechanic will help replace your car’s throttle position sensor, which aids your car’s computer in calculating how much fuel needs to be injected through the air intake system, if it fails. You will need this service if your car can no longer change gears or doesn’t even start due to lack of power.
Your car’s sensors need to be in working order to keep your car running, and that’s why car insurance broker and comparison app Jerry has everything you need to know about replacing your car’s throttle position sensor.
The exact cost varies between different Infiniti models. For example, newer vehicle models are usually made with more expensive materials, so recent or high-end models will cost more, especially if your service requires a part replacement. Use the table below to estimate the cost for your own vehicle.
CarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration

What is a throttle position sensor replacement?

For this service, your mechanic will test the throttle position sensor to verify it has failed and replace it with a new one.
Your car needs the right ratio of fuel and air to run correctly, and this ratio is managed by the air intake system. The throttle body controls how much air enters the car’s engine with a throttle plate—the more you push down on the gas pedal, the wider it opens and the more air goes to the engine.
The throttle position sensor tells your car’s computer, or engine control unit, what position the throttle plate is in, and then the computer calculates how much fuel needs to be injected into the air intake system. If the sensor fails, the computer cannot calculate how much air is already in the engine and won’t inject the right amount of fuel.

How to replace a throttle position sensor

Here are the steps a mechanic will usually take to replace a throttle position sensor:
  • Scan the car’s computer system for error codes
  • Pop the hood to inspect throttle plate and the surrounding area
  • Test the throttle position sensor and related wiring
  • Remove faulty throttle position sensor
  • Install new functioning throttle position sensor
  • Clean any carbon buildup from the throttle body
  • Reinstall the throttle body and reset the minimum idle speed to the factory setting
  • Clear any trouble codes from the car’s computer and check for proper operation
  • Drive the car to test for proper gear shifting, speed, and acceleration
When you replace your car’s throttle position sensor, it will need to be checked for software updates.

When do I need to replace my throttle position sensor?

If your car’s engine has poor performance, lack of power, the gears are not shifting, or the check engine light comes on, you may need to have the throttle position sensor inspected.
This is a fairly normal problem, but it needs to be taken care of quickly.
You should take your car to the shop for an inspection when you notice any of the side effects listed above. To run efficiently, your car needs the right ratio of air and fuel. When the throttle position sensor stops working, the engine will not get the right amount of air and will lose power. You may not be able to shift gears, and the car may not even start anymore.

How to save on your auto insurance

Your car should be covered by the right auto insurance policy to complement its scheduled maintenance. Let Jerry make it easier than ever to find cheap auto insurance rates.
Jerry will provide you with affordable quotes from top insurance providers in under a minute. You can get signed up for a new policy as soon as you’re ready, and Jerry can even help you cancel your existing policy.
The best part is getting all of the savings with none of the hassle. The average Jerry user saves $887 per year!
Keep in mind that your location is another factor that determines the final cost of repairs. Areas with higher cost of living will usually have more expensive car repair services, especially if there’s less local competition. Check out the table below for an estimate of what Infiniti drivers pay in different cities.
CityCarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration
Jerry doesn’t just offer fair price repair estimates for Infiniti drivers! Our team of writers has collected everything you need to know for every car. Here’s how much the repair costs for some popular cars:
CarTotal Cost EstimateParts CostLabor CostAverage Dealer PriceEstimated Service Duration
The cost of repairs might vary depending on which Infiniti you drive, but there’s an easy way to save money for the services you need! Just download the Jerry app for help lowering your insurance premiums. In less than 45 seconds, Jerry collects all of your information from your existing insurer. Choose from competitive quotes from top insurance companies and Jerry takes care of the rest—securing your new policy and helping you cancel your old one upon request.
With an average annual savings of $887, Jerry can help you free up funds for the repairs your Infiniti’s needs.