P1128 2004 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 2004 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.
Code P1128 2004 Infiniti G35 Description
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.
What are the Possible Causes of the DTC P1128 2004 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 2004 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 2004 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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Frequently Asked Questions about P1128 2004 Infiniti G35 Code
1. What does the OBDII code P1128 mean on a 2004 Infiniti G35?
P1128 indicates a short circuit in the throttle control motor circuit, which affects the electronic throttle system's ability to regulate airflow into the engine.
2. What are the common symptoms of the P1128 code on a 2004 Infiniti G35?
Symptoms may include reduced engine performance, poor throttle response, the engine going into limp mode, and illumination of the check engine light.
3. What causes the P1128 code to appear on a 2004 Infiniti G35?
Possible causes include a damaged throttle control motor, faulty wiring or connectors in the throttle control circuit, or a malfunctioning Engine Control Module (ECM).
4. Can I drive my 2004 Infiniti G35 with the P1128 code?
It’s not recommended to drive with this code, as the vehicle may enter limp mode and experience reduced throttle control, potentially leading to unsafe driving conditions.
5. How can I diagnose the P1128 code on my 2004 Infiniti G35?
Start by inspecting the throttle control motor wiring and connectors for damage, test the throttle control motor for proper function, and check the ECM for any related issues.
6. How do I fix the P1128 code on my 2004 Infiniti G35?
Repairs may include replacing damaged wiring or connectors, repairing or replacing the throttle control motor, or replacing a faulty ECM if necessary.
7. How much does it cost to repair the P1128 code on a 2004 Infiniti G35?
Repair costs can vary but typically range from $150 to $500, depending on whether the issue involves wiring repairs, throttle control motor replacement, or ECM replacement.
8. Can a dirty throttle body cause the P1128 code?
While unlikely, a dirty throttle body can contribute to throttle control issues. Cleaning it may help, but it’s more important to check for electrical shorts in the throttle motor circuit.
9. What tools do I need to troubleshoot the P1128 code on a 2004 Infiniti G35?
You’ll need an OBDII scanner, a multimeter to check the electrical circuit, and possibly a throttle body cleaning kit if debris is suspected.
10. What happens if I ignore the P1128 code on my 2004 Infiniti G35?
Ignoring the code can lead to poor engine performance, worsening throttle control problems, and potential damage to other components in the electronic throttle system.
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