Throttle Position Sensor Symptoms and Repair Advice

What is a Throttle Position Sensor (TPS)?

The throttle position sensor is a small part that has a big job. It is a key component of the emissions system. It rests on the throttle body of most vehicles and is typically held on with two to three fasteners.

It's located on the throttle body and reads the angle of the throttle valve based on the position of the gas pedal. It then transmits the data to the engine control computer.

Symptoms of Wear or Failure of the Throttle Position Sensor

Check Engine Light may come on
Engine may hesitate, misfire, or jerk upon acceleration
Automatic transmission may shift erratically
Engine may stall without warning

How to Replace the Throttle Position Sensor

When replacing the throttle position sensor, be sure to clean the throttle body, check the throttle cables, and make sure that the air filter is clean.

Remove the rubber air intake tube to gain access to the throttle position sensor
In some cases, the throttle body may have to be removed to gain access to the sensor
Disconnect the electrical connector from the old sensor
Remove the fasteners and old throttle position sensor
When installing the new sensor, make sure the rotating teeth are properly aligned
Tighten the fasteners and connect the electrical connector
Clear any PCM codes and perform a Drive Cycle Test Drive to verify the repair (Source: Repair Pal).

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