P2106
DTC P2106: Throttle Actuator Control (TAC) System Performance - Throttle Limitation ActiveCircuit Description
The Engine Control Module (ECM) controls the throttle valve by applying a varying voltage to the control circuits of the Throttle Actuator Control (TAC) motor. The ECM monitors the duty cycle that is required to actuate the throttle valve. The ECM monitors the Throttle Position (TP) sensors 1 and 2 to determine the actual throttle valve position.
Conditions for Setting the DTC
- Ignition ON.
- The ECM detects the system is in Limit Performance Mode.
Action Taken When the DTC Sets
- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.
Conditions for Clearing the MIL/DTC
- A history DTC will clear after 40 consecutive warm up cycles without a fault.
- The DTC(s) can be cleared by using the scan tool.
- Disconnecting the ECM battery feed for more than 10 seconds.
Test Description
The numbers below refer to the step numbers on the diagnostic table:
1. Vehicles with only two DTCs, P2106 and P2110 should be checked for low voltage and charging system issues. This is because the ECM sets these two DTCs with no other DTCs in order to prevent the throttle actuator errors caused by a continued low voltage condition. Replacing engine management system (EMS) related hardware will not resolve this concern.
Troubleshooting
