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P1126 2003 Infiniti G35 Code - Throttle Control Motor Relay Circuit Open

Quick Answer

The P1126 code for a 2003 Infiniti G35 indicates a problem with the Throttle Control Motor Relay Circuit being open. Common causes include Faulty throttle control motor relay, Damaged wiring or connectors in the circuit, Malfunctioning throttle control motor. 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 2003 Infiniti G35 indicates Throttle Control Motor Relay Circuit Open.
Common causes
Common causes include Faulty throttle control motor relay, Damaged wiring or connectors in the circuit, Malfunctioning throttle control motor.
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 15, 2024
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Code P1126 2003 Infiniti G35 Description

The P1126 code for a 2003 Infiniti G35 indicates a problem with the Throttle Control Motor Relay Circuit being open. This means that there is an issue with the circuit that controls the throttle motor relay, which is responsible for regulating the throttle opening in response to driver input. The throttle control motor relay circuit is a crucial component of the vehicle's electronic throttle control system, which plays a key role in managing engine performance and fuel efficiency.

OBDII Code P1126 2003 Infiniti G35 - Throttle Control Motor Relay Circuit Open
P1126 2003 Infiniti G35 Code - Throttle Control Motor Relay Circuit Open

Common Causes of P1126 2003 Infiniti G35

  1. Faulty throttle control motor relay
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning throttle control motor
  4. Corrosion or poor connections in the circuit
  5. Electronic control module (ECM) issues

Symptoms of P1126 2003 Infiniti G35

  1. Reduced engine power or acceleration
  2. Engine stalling or difficulty starting
  3. Illumination of the Check Engine Light
  4. Rough idling or irregular engine performance
  5. Vehicle going into "limp mode" to prevent further damage

How to Fix P1126 2003 Infiniti G35

  1. Begin by conducting a thorough inspection of the throttle control motor relay circuit, checking for any visible damage or loose connections.
  2. Test the throttle control motor relay using a multimeter to determine if it is functioning correctly.
  3. Inspect the wiring and connectors in the circuit for any signs of damage or corrosion, repairing or replacing as needed.
  4. Test the throttle control motor itself to ensure it is operating within specifications, replacing if necessary.
  5. Clear the diagnostic trouble codes from the vehicle's computer and perform a test drive to verify that the issue has been resolved.

Cost to Fix P1126 2003 Infiniti G35

The typical repair costs for addressing a P1126 code in a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, parts for this repair could range from $50 to $200, with labor costs adding an additional $100 to $200. Overall, the total repair cost could fall between $150 and $400. However, it's important to note that these estimates are approximate and actual costs may vary based on factors such as location, vehicle make and model, and the rates of the auto repair shop. It is recommended to obtain quotes from local repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P1126 2003 Infiniti G35

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.

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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 2003 Infiniti G35 Code

1. What does the OBDII code P1126 mean on a 2003 Infiniti G35?

The P1126 code indicates an issue with the throttle control motor relay circuit, specifically that it is open or malfunctioning.

2. What are the common symptoms of the P1126 code on an Infiniti G35?

Symptoms include poor throttle response, reduced engine performance, the engine going into limp mode, and the check engine light turning on.

3. What causes the P1126 code to appear on a 2003 Infiniti G35?

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

4. Can I drive my 2003 Infiniti G35 with the P1126 code?

While the car may still be drivable, it could enter limp mode, limiting speed and power. Driving with this issue could also cause further damage, so it’s best to address it promptly.

5. How do I diagnose the P1126 code on a 2003 Infiniti G35?

Start by inspecting the throttle control motor relay and its wiring for damage or corrosion. You can also use a multimeter to test the relay and circuit for proper function.

6. How do I fix the P1126 code on my Infiniti G35?

Repairs may include replacing the throttle control motor relay, repairing or replacing damaged wiring, or, if necessary, reprogramming or replacing the ECM.

7. Is the throttle control motor relay expensive to replace on a 2003 Infiniti G35?

The relay itself is relatively inexpensive, typically costing around $10 to $50, but labor costs can increase the total repair price if professional help is needed.

8. What tools are needed to fix the P1126 code?

You’ll need a multimeter to test the circuit, a diagnostic scanner to clear the code, and basic tools like screwdrivers and pliers to replace the relay or repair wiring.

9. Can a dirty throttle body cause the P1126 code on a 2003 Infiniti G35?

A dirty throttle body is unlikely to cause this specific code, but cleaning it while diagnosing the issue can help prevent other throttle-related problems.

10. Will clearing the code with an OBDII scanner fix the P1126 issue?

Clearing the code will reset the check engine light temporarily, but the issue will return unless the underlying problem with the throttle control motor relay circuit is resolved.

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