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P1128 Nissan Code - Throttle Control Motor Circuit Short

Quick Answer

The P1128 diagnostic trouble code (DTC) for Nissan vehicles specifically indicates a problem with the Throttle Control Motor Circuit being shorted. Common causes include Wiring or connector issues in the throttle control motor circuit, Faulty throttle control motor, Corrosion or damage to the connections in the circuit. 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 Nissan indicates Throttle Control Motor Circuit Short.
Common causes
Common causes include Wiring or connector issues in the throttle control motor circuit, Faulty throttle control motor, Corrosion or damage to the connections in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P1128 Nissan Description

The P1128 diagnostic trouble code (DTC) for Nissan vehicles specifically indicates a problem with the Throttle Control Motor Circuit being shorted. This means that there is an electrical issue within the throttle control motor circuit that is causing a short circuit. The throttle control motor is responsible for regulating the amount of air that enters the engine, which in turn affects the vehicle's performance and fuel efficiency. When this circuit is shorted, it can lead to erratic engine performance, reduced power, and potentially even stalling of the vehicle.

OBDII Code P1128 Nissan - Throttle Control Motor Circuit Short
P1128 Nissan Code - Throttle Control Motor Circuit Short

Common Causes of P1128 Nissan

  1. Wiring or connector issues in the throttle control motor circuit
  2. Faulty throttle control motor
  3. Corrosion or damage to the connections in the circuit
  4. Electrical issues in the vehicle's main computer system
  5. Overheating of the throttle control motor

Symptoms of P1128 Nissan

  1. Check engine light illuminated on the dashboard
  2. Loss of power or acceleration
  3. Engine stalling or rough idling
  4. Difficulty starting the vehicle
  5. Reduced fuel efficiency

How to Fix P1128 Nissan

  1. Begin by conducting a thorough inspection of the throttle control motor circuit, checking for any visible damage or loose connections.
  2. Test the throttle control motor for functionality and replace if necessary.
  3. Clear the DTC from the vehicle's computer system using an OBD-II scanner.
  4. Repair or replace any damaged wiring or connectors in the circuit.
  5. Reset the vehicle's computer system and test drive to ensure the issue has been resolved.

Cost to Fix P1128 Nissan

The cost of repairing a P1128 Throttle Control Motor Circuit Short code can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair costs can range from $200 to $500, including parts and labor. As mentioned before, it's important to consider the specific diagnosis time and labor rates at auto repair shops in your area to get a more accurate estimate.

When is the Code Detected?

Engine Control Module (ECM) detects short both circuits between ECM and throttle control motor.

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Information for Specific Nissan Models

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.

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