AutoCodes – Infiniti – P1121 2005 Infiniti G35

P1121 2005 Infiniti G35 Code - Electric Throttle Control Actuator

Quick Answer

Electric Throttle Control Actuator consists of throttle control motor, Throttle Position Sensor (TPS), etc. Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection. 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 2005 Infiniti G35 indicates Electric Throttle Control Actuator.
Common causes: Common causes include Faulty Electric Throttle Control Actuator, Electric Throttle Control Actuator harness is open or shorted, Electric Throttle Control Actuator circuit poor electrical connection.
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.

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Code Popularity 6,408

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 25, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1121 2005 Infiniti G35 Description

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.

OBDII Code P1121 2005 Infiniti G35 - Electric Throttle Control Actuator - AutoCodes.com — P1121 2005 Infiniti G35 Code - Electric Throttle Control Actuator

What does this mean?

What are the Possible Causes of the DTC P1121 2005 Infiniti G35?

Faulty Electric Throttle Control Actuator
Electric Throttle Control Actuator harness is open or shorted
Electric Throttle Control Actuator circuit poor electrical connection

How to Fix the DTC P1121 2005 Infiniti G35?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1121 2005 Infiniti G35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 2005 Infiniti G35 Code

1. What does the OBDII code P1121 mean on a 2005 Infiniti G35?

P1121 indicates a problem with the Electric Throttle Control Actuator, suggesting the throttle position sensor or actuator motor is not functioning properly.

2. What are the common symptoms of the P1121 code on a 2005 Infiniti G35?

Common symptoms include reduced engine power, poor throttle response, hesitation during acceleration, and the Check Engine Light being illuminated.

3. What causes the P1121 code to appear on a 2005 Infiniti G35?

The P1121 code can be caused by a faulty throttle position sensor, damaged wiring or connectors, a malfunctioning throttle body, or issues with the engine control module (ECM).

4. Can I drive my 2005 Infiniti G35 with the P1121 code?

Driving with the P1121 code is not recommended, as it can cause poor performance, reduced fuel efficiency, and potential safety issues due to throttle control problems.

5. How do I diagnose the P1121 code on a 2005 Infiniti G35?

To diagnose the P1121 code, inspect the throttle body and its wiring for damage, check the throttle position sensor, and use a scan tool to monitor live data from the throttle control system.

6. How do I fix the P1121 code on a 2005 Infiniti G35?

Fixing the P1121 code may involve cleaning or replacing the throttle body, repairing damaged wiring or connectors, or replacing the throttle position sensor.

7. Is the throttle body the only part that can cause the P1121 code?

No, the P1121 code can also be triggered by issues with the throttle position sensor, actuator motor, wiring, or the ECM.

8. How much does it cost to repair the P1121 code on a 2005 Infiniti G35?

Repair costs vary but can range from $100 to $650 depending on whether the throttle body, sensors, or wiring need repair or replacement.

9. Can cleaning the throttle body fix the P1121 code?

In some cases, cleaning the throttle body to remove carbon buildup can resolve the P1121 code, but further diagnosis is needed to confirm the root cause.

10. Does the P1121 code require reprogramming the ECM after repairs?

Reprogramming the ECM is typically not required for the P1121 code, but clearing the code and performing a throttle relearn procedure may be necessary.