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Engine-Codes – Infiniti – P1121 2003 Infiniti G35

P1121 2003 Infiniti G35 Code - Electric Throttle Control Actuator

Quick Answer

The P1121 code in a 2003 Infiniti G35 indicates an issue with the Electric Throttle Control Actuator. Common causes include Faulty electric throttle control actuator, Malfunctioning throttle position sensor, Wiring issues or electrical connection problems. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1121 2003 Infiniti G35 indicates Electric Throttle Control Actuator.
Common causes
Common causes include Faulty electric throttle control actuator, Malfunctioning throttle position sensor, Wiring issues or electrical connection problems.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1121 2003 Infiniti G35 Description

The P1121 code in a 2003 Infiniti G35 indicates an issue with the Electric Throttle Control Actuator. This component is responsible for controlling the throttle opening in response to driver input. When this code is triggered, it means that the Engine Control Module (ECM) has detected a problem with the electric throttle control system.

OBDII Code P1121 2003 Infiniti G35 - Electric Throttle Control Actuator
P1121 2003 Infiniti G35 Code - Electric Throttle Control Actuator

Common Causes of P1121 2003 Infiniti G35

  1. Faulty electric throttle control actuator
  2. Malfunctioning throttle position sensor
  3. Wiring issues or electrical connection problems
  4. ECM software glitches
  5. Environmental factors such as moisture or debris affecting the components

Symptoms of P1121 2003 Infiniti G35

  1. Loss of power or acceleration
  2. Rough idling or stalling
  3. Unresponsive throttle pedal
  4. Check Engine Light illuminated
  5. Limp mode activation

How to Fix P1121 2003 Infiniti G35

  1. Begin by diagnosing the specific cause of the P1121 code using a diagnostic scanner to pinpoint the exact issue.
  2. Inspect the electric throttle control actuator, throttle position sensor, and associated wiring for any visible damage or signs of wear.
  3. Test the components for proper functionality and replace any faulty parts as needed.
  4. Clear the code from the ECM's memory and perform a throttle relearn procedure to recalibrate the system.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the symptoms associated with the P1121 code have been eliminated.

Cost to Fix P1121 2003 Infiniti G35

The cost of repairing a P1121 code in a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's best to obtain quotes from multiple sources to get an accurate estimate.

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

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1121 2003 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1121 in a 2003 Infiniti G35?

The common symptoms of code P1121 in a 2003 Infiniti G35 include reduced engine power, hesitation during acceleration, and the vehicle going into limp mode.

2. What does the OBDII code P1121 in a 2003 Infiniti G35 indicate?

Code P1121 in a 2003 Infiniti G35 indicates an issue with the Electric Throttle Control Actuator.

3. What are the possible causes of OBDII code P1121 in a 2003 Infiniti G35?

Possible causes of code P1121 in a 2003 Infiniti G35 include a faulty electric throttle control actuator, wiring issues, or a problem with the throttle position sensor.

4. How can I diagnose the OBDII code P1121 in a 2003 Infiniti G35?

Diagnosing code P1121 in a 2003 Infiniti G35 involves using a scan tool to check for the specific fault code, inspecting the electric throttle control actuator and its wiring, and testing the throttle position sensor.

5. Can I drive my 2003 Infiniti G35 with OBDII code P1121?

It is not recommended to drive your 2003 Infiniti G35 with OBDII code P1121 as it can lead to further damage and potential safety issues due to reduced engine performance.

6. How can I repair OBDII code P1121 in a 2003 Infiniti G35?

Repairing code P1121 in a 2003 Infiniti G35 may involve replacing the electric throttle control actuator, repairing any damaged wiring, or recalibrating the throttle position sensor.

7. Is it safe to continue driving if the OBDII code P1121 in a 2003 Infiniti G35 comes and goes?

It is not recommended to continue driving your 2003 Infiniti G35 if the OBDII code P1121 comes and goes, as intermittent issues can still affect the performance and safety of the vehicle.

8. How much does it cost to fix OBDII code P1121 in a 2003 Infiniti G35?

The cost to fix OBDII code P1121 in a 2003 Infiniti G35 can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars for parts and labor.

9. Can I reset the OBDII code P1121 in a 2003 Infiniti G35 by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is not a recommended method to reset OBDII codes as the underlying issue causing the code will still need to be addressed.

10. How often does the Electric Throttle Control Actuator need to be replaced in a 2003 Infiniti G35?

The Electric Throttle Control Actuator in a 2003 Infiniti G35 typically does not need frequent replacement unless it fails or malfunctions, which can vary depending on driving conditions and maintenance.

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