Engine-Codes - Infiniti - P1121 2003 Infiniti G35

P1121 2003 Infiniti G35 Code - Electric Throttle Control Actuator

- Code Popularity: 9,431 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1121 2003 Infiniti G35?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Electric Throttle Control Actuator
  • Electric Throttle Control Actuator harness is open or shorted
  • Electric Throttle Control Actuator circuit poor electrical connection
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How to Fix the DTC P1121 2003 Infiniti G35?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1121 2003 Infiniti G35 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

When is the Code Detected?

Electric throttle control actuator does not function properly due to the return spring malfunction or throttle valve is stuck open

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No throttle pedal response

What Does the P1121 2003 Infiniti G35 Code Mean?

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throttle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

P1121 2003 Infiniti G35 Code - Electric Throttle Control Actuator

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