GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 Allure 🢒 Engine 🢒 Engine Controls and Fuel - 2.8L, 3.0L, 3.2L, or 3.6L 🢒 DTC P2107

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2107: Throttle Actuator Control (TAC) Module Internal Circuit

Circuit/System Description

The engine control module (ECM) controls the throttle valve by applying a varying voltage to the throttle actuator control motor. The ECM monitors the actual throttle valve position using throttle position (TP) sensor 1 and 2. The ECM amplifies the TP sensor 1 signal in order to obtain a more accurate signal. The ECM monitors the TP sensor 1 amplification output whenever the ignition is ON and a closed throttle test is performed.

Conditions for Running the DTC
    • The vehicle speed is 0 km/h (0 mph).
    • The engine speed is less than 40 RPM.
    • The engine coolant temperature (ECT) is 5-85°C (41-185°F).
    • The intake air temperature (IAT) is 5-60°C (41-140°F).
    • The ignition voltage is greater than 10 volts.
    • The accelerator pedal position (APP) is less than 15 percent.
    • The ECM is performing the closed throttle test with the ignition ON and the engine OFF.
    • DTC P2107 runs once, when the above conditions are met during the throttle actuator control system initialization.

Conditions for Setting the DTC

The ECM detects the internal TP sensor 1 amplification output does not correlate with the TP sensor 1 signal voltage for greater than 4 seconds, or for a cumulative of 50 seconds.

Action Taken When the DTC Sets

DTC P2107 is a Type C DTC.

Conditions for Clearing the DTC

DTC P2107 is a Type C DTC.

Circuit/System Verification
  1. Ignition ON, observe the scan tool DTC information for 30 seconds. DTC P2107 should not set.
    2. ⇒If DTC P2107 sets, replace the ECM.
  2. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for engine control module replacement, setup, and programming