P2018 OBD-II Trouble Code: Throttle Actuator Control Module Performance

P2108 code definition

Throttle actuator control module performance

What the P2108 code means

This trouble code indicates that the powertrain control module has detected a malfunction with the throttle body control motor or module. This code is only found on vehicles that have an electronic throttle body.

What are the causes of the P2108 code?

Some potential causes of this trouble code would include:

• The throttle body motor has stopped functioning
• The throttle control module has started malfunctioning
• The throttle position sensor no longer operates properly

What are the symptoms of the P2108 code?

Symptoms of this trouble code that the driver may experience would include:

• The engine may not start or have trouble starting.

• The engine may accelerate poorly or not accelerate at all.

• The engine may idle incorrectly.

• The engine may go into a fail-safe mode which reduces engine power and in some cases will disable the engine completely.

• The Check Engine Light will be illuminated.

How does a mechanic diagnose the P2108 code?

A mechanic may begin diagnosing this trouble code by removing anything necessary to access the throttle body, throttle position sensor, and throttle body control module.

Once these items are accessible, the mechanic would then reference the manufacturer’s service information to decide how to test the throttle body motor, throttle position sensor, and throttle body control module.

When these tests have been carried out, the mechanic would note their findings and relay them over to the customer to make a repair decision.

Common mistakes when diagnosing the P2108 code

Sometimes mechanics can spend hours looking for the throttle position sensor. If this sensor is difficult to find under the hood, remember that sometimes this sensor can actually be a pedal position sensor and may be located in the driver floor area. Keeping this in mind can save a lot of time if the sensor is not on the throttle body.

How serious is the P2108 code?

This code is very serious as it can affect the way the engine performs. With a throttle that is not working properly, there is no way for the engine can perform properly. I would advise having this trouble code diagnosed and repaired as soon as possible because this trouble code can prevent your vehicle from operating at all.

What repairs can fix the P2108 code?

Repairs that can fix this trouble code would include:

• Replacing the throttle position sensor or its circuitry
• Replacing the throttle body motor or entire throttle body depending on the build style.
• Replacing the throttle control module or powertrain control module.

Additional comments regarding the P2108 code

Never try to open an electronic throttle body manually. This includes using your hands or any other tool to open the throttle body by force. This will only cause more damage to the throttle system than before. If the throttle motor was not bad before, it very well could go bad after doing something like that.

Need help with a P2108 code?

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