AutoCodes – Infiniti – P1128 2005 Infiniti G35

P1128 2005 Infiniti G35 Code - Throttle Control Motor Circuit Short

Quick Answer

The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Common causes include Faulty Throttle Control Motor, Throttle Control Motor harness is open or shorted, Throttle Control Motor 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: P1128 2005 Infiniti G35 indicates Throttle Control Motor Circuit Short.
Common causes: Common causes include Faulty Throttle Control Motor, Throttle Control Motor harness is open or shorted, Throttle Control Motor 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 2,429

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 26, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1128 2005 Infiniti G35 Description

The throttle control motor is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feedback to the ECM to control the throttle control motor to make the throttle valve opening angle properly in response to driving condition.

OBDII Code P1128 2005 Infiniti G35 - Throttle Control Motor Circuit Short - AutoCodes.com — P1128 2005 Infiniti G35 Code - Throttle Control Motor Circuit Short

What does this mean?

What are the Possible Causes of the DTC P1128 2005 Infiniti G35?

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

How to Fix the DTC P1128 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 P1128 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.

Need more information about the P1128 2005 Infiniti G35 code?

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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 P1128 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1128 in a 2005 Infiniti G35?

The common symptoms of code P1128 in a 2005 Infiniti G35 include engine stalling, rough idling, loss of power, and the Check Engine light illuminating.

2. What does the OBDII code P1128 in a 2005 Infiniti G35 indicate?

Code P1128 in a 2005 Infiniti G35 indicates a potential issue with the Throttle Control Motor Circuit Short.

3. What are the possible causes of OBDII code P1128 in a 2005 Infiniti G35?

Possible causes of code P1128 in a 2005 Infiniti G35 include a faulty throttle control motor, wiring issues in the circuit, or a problem with the throttle position sensor.

4. How can I diagnose the Throttle Control Motor Circuit Short issue in my 2005 Infiniti G35?

Diagnosing the Throttle Control Motor Circuit Short in a 2005 Infiniti G35 involves checking the throttle control motor's wiring, connectors, and the motor itself for any visible damage or issues.

5. Can I continue driving my 2005 Infiniti G35 with OBDII code P1128?

It is not recommended to continue driving your 2005 Infiniti G35 with code P1128 as it can lead to further damage to the throttle control system and potentially unsafe driving conditions.

6. How can I repair OBDII code P1128 in my 2005 Infiniti G35?

Repairing code P1128 in a 2005 Infiniti G35 may involve replacing the throttle control motor, repairing damaged wiring, or recalibrating the throttle position sensor.

7. Will resetting the Check Engine light make OBDII code P1128 disappear in my 2005 Infiniti G35?

Resetting the Check Engine light without addressing the underlying issue causing code P1128 in a 2005 Infiniti G35 will not make the code disappear. It is important to diagnose and repair the problem to clear the code.

8. How much does it cost to fix OBDII code P1128 in a 2005 Infiniti G35?

The cost to fix code P1128 in a 2005 Infiniti G35 can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast repair OBDII code P1128 in a 2005 Infiniti G35?

While some aspects of diagnosing and repairing code P1128 in a 2005 Infiniti G35 may be tackled by a DIY enthusiast, it is recommended to consult a professional mechanic for a thorough diagnosis and repair to ensure the issue is properly resolved.

10. How long does it take to fix OBDII code P1128 in a 2005 Infiniti G35?

The time required to fix code P1128 in a 2005 Infiniti G35 can vary depending on the exact cause of the problem and the complexity of the repair. It may take a few hours to a full day for a mechanic to diagnose and address the issue.