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Engine-Codes – Nissan – P1126 2002 Nissan Altima Sedan

P1126 2002 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

Quick Answer

The P1126 code for a 2002 Nissan Altima Sedan 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 2002 Nissan Altima Sedan 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 17, 2024
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Code P1126 2002 Nissan Altima Sedan Description

The P1126 code for a 2002 Nissan Altima Sedan indicates a problem with the Throttle Control Motor Relay Circuit being open. This means that there is an issue with the relay that controls the throttle motor, which is responsible for managing the throttle position in the vehicle. The throttle control motor relay is a crucial component in the electronic throttle control system, as it helps regulate the amount of air entering the engine, which in turn affects the vehicle's performance.

OBDII Code P1126 2002 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open
P1126 2002 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

Common Causes of P1126 2002 Nissan Altima Sedan

  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 relay circuit
  5. Electronic control module (ECM) issues

Symptoms of P1126 2002 Nissan Altima Sedan

  1. Sluggish acceleration
  2. Rough idling or stalling
  3. Difficulty maintaining speed
  4. Limp mode activation
  5. Check Engine Light illuminated

How to Fix P1126 2002 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the throttle control motor relay circuit, checking for any visible damage or corrosion.
  2. Test the throttle control motor relay using a multimeter to determine if it is functioning properly.
  3. Inspect the wiring and connectors in the circuit for any signs of damage or poor connections, repairing or replacing as needed.
  4. If the throttle control motor is found to be faulty, replace it with a new unit following manufacturer guidelines.
  5. Clear the diagnostic trouble codes from the vehicle's ECM and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1126 2002 Nissan Altima Sedan

The typical repair costs for addressing a P1126 code on a 2002 Nissan Altima Sedan can vary depending on the specific cause of the issue. In general, replacing a faulty throttle control motor relay or repairing damaged wiring/connectors may cost between $150 to $300, including parts and labor. However, if the throttle control motor itself needs to be replaced, the total repair cost could range from $300 to $600 or more. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.

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 2002 Nissan Altima Sedan Code

1. What are common symptoms of OBDII code P1126 in a 2002 Nissan Altima Sedan?

Common symptoms include reduced engine power, rough idling, stalling, and the vehicle going into "limp mode."

2. What does the OBDII code P1126 indicating a "Throttle Control Motor Relay Circuit Open" mean?

This code indicates an open circuit in the relay that controls the throttle control motor's operation.

3. What are possible causes of OBDII code P1126 in a 2002 Nissan Altima Sedan?

Possible causes include a faulty throttle control motor relay, damaged wiring or connectors in the circuit, or a malfunctioning throttle control motor.

4. How can I diagnose the cause of OBDII code P1126 in my 2002 Nissan Altima Sedan?

Diagnosing this code typically involves checking the throttle control motor relay, inspecting the wiring and connectors for damage, and testing the throttle control motor's functionality.

5. Can I continue driving my 2002 Nissan Altima Sedan with OBDII code P1126?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P1126 in my 2002 Nissan Altima Sedan?

Repairing this code usually involves replacing the faulty throttle control motor relay, repairing any damaged wiring or connectors, or replacing the throttle control motor if necessary.

7. Is it safe to reset the OBDII code P1126 in my 2002 Nissan Altima Sedan without fixing the issue?

Resetting the code without addressing the underlying issue may temporarily turn off the check engine light, but the problem will likely recur, and it can lead to more significant issues if left unresolved.

8. Can a DIY enthusiast fix OBDII code P1126 in a 2002 Nissan Altima Sedan?

Depending on the DIY enthusiast's skill level and access to tools, it may be possible to address this code by replacing the throttle control motor relay or repairing the wiring. However, complex electrical issues may require professional assistance.

9. How much does it typically cost to repair OBDII code P1126 in a 2002 Nissan Altima Sedan?

The cost of repairing this code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Will fixing OBDII code P1126 improve the performance of my 2002 Nissan Altima Sedan?

Yes, addressing this code should help restore proper throttle control, improve engine performance, and prevent potential drivability issues.

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