P1128 Infiniti Code - Throttle Control Motor Circuit Short
Quick Answer
The P1128 code for Infiniti vehicles indicates a potential issue with the Throttle Control Motor Circuit Short. Common causes include Damaged wiring or connectors in the throttle control motor circuit, Malfunctioning throttle control motor, Faulty throttle position sensor. 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 Infiniti indicates Throttle Control Motor Circuit Short.
- Common causes
- Common causes include Damaged wiring or connectors in the throttle control motor circuit, Malfunctioning throttle control motor, Faulty throttle position sensor.
- 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 P1128 Infiniti Description
The P1128 code for Infiniti vehicles indicates a potential issue with the Throttle Control Motor Circuit Short. This means that there is a problem with the electrical circuit that controls the throttle motor, which is responsible for regulating the amount of air entering the engine. The throttle motor plays a crucial role in maintaining the proper air-to-fuel ratio for combustion, which directly impacts the vehicle's performance and efficiency.
Common Causes of P1128 Infiniti
- Damaged wiring or connectors in the throttle control motor circuit
- Malfunctioning throttle control motor
- Faulty throttle position sensor
- Issues with the engine control module (ECM)
- Corrosion or moisture affecting electrical connections
Symptoms of P1128 Infiniti
- Hesitation or jerking during acceleration
- Rough idling or erratic engine behavior
- Engine stalling or difficulty starting
- Reduced power and acceleration
- Check Engine light illuminated on the dashboard
How to Fix P1128 Infiniti
- Diagnose the specific cause of the code by using a scan tool to retrieve the trouble codes and perform a thorough inspection of the throttle control motor circuit.
- Check and repair any damaged wiring, connectors, or components related to the throttle control motor circuit.
- Test the throttle control motor and throttle position sensor for proper functionality and replace if necessary.
- Clear the trouble codes from the ECM memory and reset the system to ensure the issue has been resolved.
- Perform a test drive to verify that the symptoms associated with the P1128 code have been eliminated.
Cost to Fix P1128 Infiniti
The typical repair costs for addressing a P1128 code in an Infiniti vehicle can vary depending on the specific cause of the issue and the parts needed for repair. On average, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's specific needs.
When is the Code Detected?
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Information for Specific Infiniti Models
- P1128 2003 Infiniti G35 — Throttle Control Motor Circuit Short
- P1128 2004 Infiniti G35 — Throttle Control Motor Circuit Short
- P1128 2005 Infiniti G35 — Throttle Control Motor Circuit Short
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