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.
If PCM recognizes vehicle state as forced limited power mode under detecting condition, it sets P2106 and then MIL(Malfunction Indication Lamp) turns on.
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 ETC Items(TPS or ETC motor etc)
? Faulty PCM
Enable Conditions
? Ignition "ON"
Threshold value
? Limit Performance Mode is active
Diagnosis Time
? -
MIL On Condition
? 1 Driving Cycle
[Tip 1]
- If Main relay has a fault(ex. Open) under engine running, the DTCs, P0638/P0685/P1295/P2106, can happen at the same time.
[Tip 2]
- If P1295 and P2106 occur at the same time, first check ETC items(TPS or ETC motor etc).
? DTC Name
- P0638 Throttle Actuator Control Range/Performance(Bank 1)
- P0685 PCM/PCM Power Relay Control Circuit /Open
- P1295 Throttle Actuator Control System - Power Management