P2108 - THROTTLE ACTUATOR CONTROL MODULE PERFORMANCE

The Powertrain Control Module (PCM) monitors the Throttle Position Sensor (TPS) to check for the proper operation of the Throttle Actuator Control (TAC) system. The position of the throttle plate determines the operation of the throttle body. This plate is controlled by the throttle actuator motor.

The P2108 OBD2 diagnostic code P2108 is related to the malfunctioning of the TAC system and is stored due to the TAC system module processor has a wrong performance. When this happens, the TAC system operation is limited by the PCM.

• Check Engine light ON.
• It is impossible to start the engine.
• There is little or no throttle response.
• Increases fuel consumption.
• Smoke from the exhaust pipe.
• The vehicle enters limp mode.

Reasons to set the P2108 OBDII fault code:

• The throttle body may be damaged.
• Perhaps the throttle plate or throttle rod is dirty.
• The Throttle Position Sensor (TPS) is possibly bad.
• The Accelerator Pedal Sensor (APS) could be faulty.
• The Throttle Actuator Control motor is deficient.
• System cables or connectors may be faulty.

When the DTC P2108 OBD2 DTC is set, try this:

• First, it is advisable to check the Technical Service Bulletins for a good diagnosis.
• Inspect all the cables and connectors that are related to the TAC Burned or worn wires should be replaced. Also, check the connectors for corrosion. Repair as necessary.
• With the ignition switch in the off position, check that the throttle plate rotates smoothly. Clean the plate if necessary.
• Use an ohmmeter to check the motor resistance of the TAC Compare the result with the specifications. Excessively high or low resistance will require the replacement of the throttle body.
• Check ground, continuity, and power signals from the Throttle Actuator Control A lack of resistance or continuity indicates wiring damage.