Fuel System > Engine Control System > P2106 Throttle Actuator Control System-Force Limited Power

Component Location

General Description

The Electronic Throttle Control(ETC) system is made of the components throttle body, Throttle Position Sensor(TPS)1&2 and Accelerator Position Sensor(APS) 1&2. The throttle body contains the actuator, the throttle plate and the throttle position sensor (potentiometer), which are integrated in one housing. The actuator consists of a DC motor with a two-stage gear. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. And it provides feedback to the PCM to control the throttle motor in order to control the throttle valve opening angle properly in response to the driving condition.

DTC Description

If PCM recognizes vehicle state as forced limited power mode under detecting condition, it sets P2106 and then MIL(Malfunction Indication Lamp) turns on.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•	This code detects if the system is in Limit Performance Mode

•	Faulty APS

•	Faulty APS+Brake

•	Faulty APS + Vehicle speed sensor

•	Faulty APS + Vehicle speed sensor + Brake

•	Faulty PCM

EnableConditions

•	Ignition "ON"

Threshold value

•	Limit Performance Mode is active

DiagnosisTime

•

MIL On Condition

•	1 Driving Cycle

※ If Main relay has a fault(ex. Open) while the engine is running, the DTCs,P0638/P0685/P1295/P2106, can happen at the same time.

-	P0638 Throttle Actuator Control Range/Performance(Bank 1)

-	P0685 PCM/PCM Power Relay Control Circuit /Open

-	P1295 Throttle Actuator Control System - Power Management

-	P2106 Throttle Actuator Control System - Forced Limited Power

Monitor Scantool Data

1.	Connect scantool to DLC(Data Link Connector)

2.	IG "ON" & Monitor that any different DTC(Diagnostic Trouble Code) is existed. (There will be at least one more DTC which causes this DTC P2106 to retrieve )

3.	P2106 will be stored in addition to related ETS codes. Repair the cause of the related codes and perform ETS initialization before troubleshooting P2106.

Is the same DTC occurred ?

▶Substitute with a known-good PCM and check for proper operation. If the problem is corrected,replace PCM and then go to "Verification of Vehicle Repair" procedure.

There is a memory reset function on scantool that can erase optional parts automaticallydetected and memorized by PCM.

Before or after testing PCM on the vehicle, use this function before reusing the PCM

▶ Go to "Verification of Vehicle Repair" procedure.

※ Procedure of ETS Initialization

1. Erase the trouble codes on PCM

2. Turn the ignition key off and keep this condition until the main relay is turned off.(10 sec.)

3. Turn ignition key on more than 1second to record the throttle motor position on the EEPROM

Verification Of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

1.	Connect scantool and select "DTC" button.

2.	Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions

3.	Read "DTC Status" parameter

Is parameter displayed "History(Not Present) fault"?

	▶ System performing to specification at this time. Clear the DTC
	▶ Go to the applicable troubleshooting procedure.