The national cost for a throttle position sensor replacement in 2023 is between $115 and $562 with an average of $236

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POPULAR VEHICLES

National average cost of a a Throttle Position Sensor Replacement
for popular vehicles:

Jeep Cherokee

Avg. cost
$562

Car Model

Avg. cost

$50

What is a throttle position sensor and how does it work?

A throttle position sensor is an electronic device that monitors the position of the engine throttle in your vehicle.
In order for an internal combustion engine to operate, it needs a specific mixture of air and fuel fed into the combustion chambers. On a modern engine, that is the job of a tube-shaped housing mounted on top of the engine called the throttle body. It is part of the air intake system. Inside the throttle body is a butterfly valve, a flat metal plate that opens and closes to allow varying amounts of air into the engine. When the plate is closed, the throttle body prevents air from entering your engine. When it is open, air enters and mixes with fuel to be injected into the cylinders. The more air and fuel, the more power.
But the mixture between the air and fuel must be in specific proportions, and the amounts of each must accommodate engine performance across a wide range of conditions. The throttle position sensor measures the degree to which the throttle valve is open and sends that information to the Engine Control Module (ECM) that controls engine operation. Besides monitoring the amount of air entering your engine, the data also informs other operations, such as fuel amount, ignition and camshaft timing, and more, so that your engine will run as efficiently as possible.

COMMON SYMPTOMS

How do I know if my vehicle needs the throttle position sensor replaced?

A bad throttle position sensor can significantly impact the performance of your engine. Under certain conditions, it can also cause engine damage. Reduced fuel economy is likely as well. Your throttle position sensor might be bad if you notice one or more of the following signs:

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HOW IS THIS SERVICE PERFORMED?

How is a a Throttle Position Sensor Replacement done?

The throttle position sensor is mounted directly on the throttle body on the top of your engine. It will likely be necessary for a technician to remove engine covers, air intake ducts, or other components to gain access to the sensor. The technician will also disconnect the negative terminal on your battery, taking care to preserve the vehicle computer memory. From there, the technician will take the following general steps:

Disconnect the electrical connecter attached to the throttle position sensor
Remove the fastener(s) holding the sensor in place
Dislodge the sensor and remove it from the throttle body
Insert and fasten the new throttle position sensor
Reconnect the wiring harness
Reinstall all components that were removed for access and the battery cable
Adjust the sensor (if needed)
Clear any diagnostic trouble codes (if necessary)
Test drive your vehicle to allow the sensor to reset itself (and to verify the repair)

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