P2105

DTC P2104, P2105, P2106, or P2110

DTC Descriptors
DTC P2104
- Throttle Actuator Control (TAC) System - Forced Engine Idle

DTC P2105
- Throttle Actuator Control (TAC) System - Forced Engine Shutdown

DTC P2106
- Throttle Control System Performance - Throttle Limitation Active

DTC P2110
- Throttle Actuator Control (TAC) System - Forced Limited Engine Speed

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

DTC P2104, P2105, P2106, and P2110 indicate that a throttle actuator control (TAC) DTC is set that causes the engine control module (ECM) to command one of the following Reduced Power modes:

* Forced engine idle
* Forced engine shutdown
* Throttle limitation
* Limited engine speed

Conditions for Running the DTC

The ignition is ON or the engine is operating.

Conditions for Setting the DTC

A failure with the TAC system is present.

Action Taken When the DTC Sets

* DTC P2104, P2106, and P02110 are Type A DTCs.
* DTC P2105 is a Type B DTC.

Conditions for Clearing the DTC

* DTC P2104, P2106, and P02110 are Type A DTCs.
* DTC P2105 is a Type B DTC.

Circuit/System Verification

Important: A low battery condition while cranking the engine may cause DTC P2106 to set. Refer to Symptoms - Engine Electrical Symptoms - Engine Electrical.


1. DTCs P2104, P2105, P2106, and P2110 are informational DTCs. Correct the TAC system DTCs that are set. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.