AutoCodes – Infiniti – P1128 2003 Infiniti G35

P1128 2003 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 2003 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 4,138

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 2003 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 2003 Infiniti G35 - Throttle Control Motor Circuit Short - AutoCodes.com — P1128 2003 Infiniti G35 Code - Throttle Control Motor Circuit Short

What does this mean?

What are the Possible Causes of the DTC P1128 2003 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 2003 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 2003 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 2003 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 2003 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1128 in a 2003 Infiniti G35?

- Common symptoms include rough idling, stalling, loss of power, and the Check Engine Light coming on.

2. What does the OBDII code P1128 on a 2003 Infiniti G35 indicate?

- OBDII code P1128 indicates a Throttle Control Motor Circuit Short.

3. What are the possible causes of OBDII code P1128 in a 2003 Infiniti G35?

- Possible causes include a faulty throttle control motor, a short circuit in the throttle control motor wiring, or a malfunctioning throttle position sensor.

4. How can I diagnose the OBDII code P1128 on my 2003 Infiniti G35?

- Diagnosing OBDII code P1128 may involve checking the throttle control motor for proper operation, inspecting the wiring for any shorts, and testing the throttle position sensor.

5. Can I continue driving my 2003 Infiniti G35 with OBDII code P1128?

- It is not recommended to continue driving with OBDII 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 on my 2003 Infiniti G35?

- Repairing OBDII code P1128 may involve replacing the throttle control motor, repairing any wiring issues, or recalibrating the throttle position sensor.

7. Will resetting the Check Engine Light resolve OBDII code P1128 in my 2003 Infiniti G35?

- Resetting the Check Engine Light may temporarily turn off the light, but it will not fix the underlying issue causing OBDII code P1128.

8. Can a DIY enthusiast fix OBDII code P1128 on a 2003 Infiniti G35?

- Depending on the skill level and access to tools, DIY enthusiasts may be able to address OBDII code P1128 by following repair guides and using diagnostic tools.

9. How much does it cost to repair OBDII code P1128 on a 2003 Infiniti G35?

- The cost of repairing OBDII code P1128 can vary depending on the specific issue, parts needed, and labor rates, but it may range from a few hundred to over a thousand dollars.

10. Is OBDII code P1128 a common issue in 2003 Infiniti G35 vehicles?

- While OBDII code P1128 may not be as common as some other codes, it can still occur in 2003 Infiniti G35 vehicles due to various factors affecting the throttle control system.