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P1126 Infiniti Code - Throttle Control Motor Relay Circuit Open

Quick Answer

The P1126 Infiniti code indicates a problem with the throttle control motor relay circuit being open. Common causes include Faulty throttle control motor relay, Wiring or connection issues in the throttle control motor relay circuit, Corrosion or damage to electrical components. 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 Infiniti indicates Throttle Control Motor Relay Circuit Open.
Common causes
Common causes include Faulty throttle control motor relay, Wiring or connection issues in the throttle control motor relay circuit, Corrosion or damage to electrical components.
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 10, 2024
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Code P1126 Infiniti Description

The P1126 Infiniti code indicates a problem with the throttle control motor relay circuit being open. The throttle control motor relay is a crucial component of the vehicle's electronic throttle control system. This system is responsible for controlling the engine's throttle opening, which in turn regulates the amount of air entering the engine and ultimately affects the vehicle's speed and performance.

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

Common Causes of P1126 Infiniti

  1. Faulty throttle control motor relay.
  2. Wiring or connection issues in the throttle control motor relay circuit.
  3. Corrosion or damage to electrical components.
  4. ECM malfunction or failure.
  5. Environmental factors such as excessive heat or moisture affecting the electrical connections.

Symptoms of P1126 Infiniti

  1. Loss of power or lack of acceleration.
  2. Engine stalling or rough idling.
  3. Reduced fuel efficiency.
  4. Illumination of the Check Engine Light.
  5. Difficulty starting the engine.

How to Fix P1126 Infiniti

  1. Diagnose the issue by using an OBD-II scanner to retrieve the specific trouble code and identify the source of the problem.
  2. Inspect the throttle control motor relay and its circuit for any visible damage or loose connections.
  3. Test the throttle control motor relay for proper functionality using a multimeter.
  4. Repair or replace any damaged wiring or connections in the circuit.
  5. If necessary, replace the throttle control motor relay or the ECM if it is found to be faulty.

Cost to Fix P1126 Infiniti

The cost of repairing a P1126 Infiniti code can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while the labor costs can range from $100 to $300. Keep in mind that these are rough estimates, and actual costs may differ based on the location, make and model of the vehicle, and the rates charged by the auto repair shop. It is recommended to obtain quotes from multiple shops to get a more accurate cost estimate.

What does this mean?

Tech Notes for P1126 Infiniti

For 2000-2001 Infiniti models see: P1126 Infiniti

When is the Code Detected?

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

Need more information about the P1126 Infiniti code?

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Information for Specific Infiniti 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 Infiniti Code

1. What does the OBDII code P1126 mean on an Infiniti?

The P1126 code indicates an issue with the throttle control motor relay circuit, specifically an open circuit in the relay.

2. What are the common symptoms of code P1126 in an Infiniti?

Symptoms may include reduced engine performance, lack of throttle response, the Check Engine Light turning on, and possible stalling.

3. What causes the P1126 code on an Infiniti?

Common causes include a faulty throttle control motor relay, damaged wiring or connectors in the circuit, or an issue with the ECM (engine control module).

4. Can a dirty throttle body cause code P1126 on an Infiniti?

No, a dirty throttle body would not directly trigger a P1126 code, as it specifically relates to the throttle control motor relay circuit.

5. How do you diagnose the P1126 code on an Infiniti?

Diagnosis involves inspecting the throttle control motor relay, checking the wiring and connectors for damage, and testing the relay for proper operation.

6. Can a bad throttle control motor trigger the P1126 code on an Infiniti?

While P1126 is related to the relay circuit, a failing throttle control motor could indirectly affect the relay's performance and trigger the code.

7. Is it safe to drive an Infiniti with the P1126 code?

Driving with this code can be risky as it may cause throttle performance issues, which could lead to unsafe driving conditions or stalling.

8. How do you fix the P1126 code on an Infiniti?

Repairs may involve replacing the faulty throttle control motor relay, repairing or replacing damaged wiring, or addressing issues in the ECM.

9. How much does it cost to fix the P1126 code on an Infiniti?

The cost will vary depending on the repair needed, but replacing the throttle control motor relay typically costs between $50 and $150, plus labor.

10. Can a DIYer fix the P1126 code on an Infiniti?

Yes, if the issue is a simple relay replacement or wiring repair, a DIYer with basic tools and knowledge can potentially fix it. However, advanced electrical diagnostics may require professional assistance.

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