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P1126 Nissan Code - Throttle Control Motor Relay Circuit Open

Quick Answer

The P1126 Nissan code indicates that there is an open circuit in the throttle control motor relay. Common causes include Faulty throttle control motor relay, Loose or corroded electrical connections, Damaged wiring harness. 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
P1126 Nissan indicates Throttle Control Motor Relay Circuit Open.
Common causes
Common causes include Faulty throttle control motor relay, Loose or corroded electrical connections, Damaged wiring harness.
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 Aug 25, 2024
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Code P1126 Nissan Description

The P1126 Nissan code indicates that there is an open circuit in the throttle control motor relay. This relay is responsible for controlling the throttle motor, which adjusts the throttle valve opening angle based on signals from the engine control module (ECM). When the circuit is open, it means that there is a break in the electrical connection, preventing the relay from functioning properly. This can result in the throttle not responding correctly to driver input, leading to issues with acceleration, fuel efficiency, and overall engine performance. If left unaddressed, this issue can cause further damage to the throttle control system and potentially other engine components.

OBDII Code P1126 Nissan - Throttle Control Motor Relay Circuit Open
P1126 Nissan Code - Throttle Control Motor Relay Circuit Open

Common Causes of P1126 Nissan

  1. Faulty throttle control motor relay
  2. Loose or corroded electrical connections
  3. Damaged wiring harness
  4. ECM software issues
  5. Mechanical issues with the throttle control motor

Symptoms of P1126 Nissan

  1. Engine stalling or surging
  2. Loss of power or hesitation during acceleration
  3. Illuminated Check Engine Light
  4. Reduced fuel efficiency
  5. Inability to maintain a consistent idle speed

How to Fix P1126 Nissan

  1. Diagnose the issue by using a scan tool to check for the P1126 code and inspecting the throttle control motor relay and related components.
  2. Replace the faulty throttle control motor relay if necessary.
  3. Check and repair any loose or corroded electrical connections.
  4. Inspect and repair any damaged wiring harnesses.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1126 Nissan

The cost of repairing a P1126 Nissan code can vary depending on the severity of the issue and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $150, while the labor costs can be between $100 and $200. This brings the total estimated cost to around $150 to $350. However, it's important to remember that labor rates can vary, so it's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P1126 Nissan

For 2000-2001 Nissan models see: P1126 Nissan

When is the Code Detected?

Engine Control Module (ECM) detects a voltage of power source for throttle control motor is excessively low.

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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.

Frequently Asked Questions about P1126 Nissan Code

1. What are the common symptoms of OBDII code P1126 in a Nissan related to the Throttle Control Motor Relay Circuit Open?

The common symptoms include reduced engine power, acceleration issues, and the vehicle going into "limp mode."

2. What are the possible causes of the OBDII code P1126 in a Nissan indicating a Throttle Control Motor Relay Circuit Open?

The code can be triggered by a faulty throttle control motor relay, damaged wiring or connectors in the circuit, or a malfunctioning throttle control motor.

3. How can I diagnose the Throttle Control Motor Relay Circuit Open issue causing OBDII code P1126 in my Nissan?

You can use a multimeter to check the continuity of the relay, inspect the wiring for any visible damage, and perform a thorough inspection of the throttle control motor for any issues.

4. Is it safe to drive my Nissan with the OBDII code P1126 indicating a Throttle Control Motor Relay Circuit Open?

It is not recommended to drive the vehicle with this issue, as it can lead to further damage and potential safety hazards due to the loss of proper throttle control.

5. How can I repair the Throttle Control Motor Relay Circuit Open problem associated with OBDII code P1126 in my Nissan?

Repairing the issue involves replacing the faulty throttle control motor relay, repairing or replacing damaged wiring or connectors, and ensuring proper functioning of the throttle control motor.

6. Can a DIY enthusiast fix the OBDII code P1126 related to Throttle Control Motor Relay Circuit Open in a Nissan?

While some DIY enthusiasts may have the skills to diagnose and repair this issue, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the problem is fixed correctly.

7. Will resetting the OBDII code P1126 in my Nissan make the issue related to Throttle Control Motor Relay Circuit Open go away?

Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code. The issue should be properly diagnosed and repaired to prevent further complications.

8. Are there any preventive maintenance tips to avoid encountering the OBDII code P1126 indicating a Throttle Control Motor Relay Circuit Open in my Nissan?

Regularly inspecting and maintaining the throttle control system, checking for any signs of wear or damage, and addressing any issues promptly can help prevent the occurrence of this code.

9. Can extreme weather conditions or driving habits contribute to the activation of the OBDII code P1126 associated with Throttle Control Motor Relay Circuit Open in a Nissan?

Extreme weather conditions or aggressive driving habits can potentially exacerbate existing issues with the throttle control system, leading to the triggering of this code.

10. How long does it typically take to repair the Throttle Control Motor Relay Circuit Open problem causing OBDII code P1126 in a Nissan?

The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a mechanic to diagnose, repair, and test the throttle control system to ensure the problem is resolved effectively.

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