P1129 TOYOTA - Electric Throttle Control System Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1129 TOYOTA Possible Causes

  • Faulty Electronic Throttle Control System (ETCS) Actuator
  • Electronic Throttle Control System (ETCS) Actuator harness is open or shorted
  • Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection

How do I fix code P1129 TOYOTA

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P1129 TOYOTA code

    Labor: 1.0

    The cost of diagnosing the P1129 TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P1129 TOYOTA code detected?

The P1129 code is set when the throttle opening angle continues to vary great from target throttle opening angle.

P1129 TOYOTA Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1129 TOYOTA Meaning

Electric Throttle Control System (ETCS) is composed of the throttle motor to operate the throttle valve, the electromagnetic clutch to connect the throttle motor with the throttle valve, the throttle position sensor to detect the opening angle of the throttle valve, the accelerator pedal position sensor to detect the accelerator pedal position, the Engine Control Module (ECM) to control the ETCS and the one valve type throttle body.
The ECM controls the throttle motor to make the throttle valve opening angle properly in response driving condition.
The throttle position sensor which is mounted on the throttle body detects the opening angle of the throttle valve, and it provides feedback to the ECM to control the throttle motor.
If the ETCS has a malfunction, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring.
However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.
OBDII Code P1129 TOYOTA - Electric Throttle Control System Malfunction - Engine-Codes.com

P1129 TOYOTA More Information

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