AutoCodesInfiniti – P1126 2003 Infiniti G35

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

Quick Answer

Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. Common causes include Fualty Throttle Control Motor relay, Throttle Control Motor relay harness is open or shorted, Throttle Control Motor relay circuit poor electrical connection. 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 Fualty Throttle Control Motor relay, Throttle Control Motor relay harness is open or shorted, Throttle Control Motor relay circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 8,096
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 26, 2019
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Code P1126 2003 Infiniti G35 Description

Power supply for the throttle control motor is provided to the Engine Control Module (ECM) via throttle control motor relay. The throttle control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not provided to the ECM.
OBDII Code P1126 2003 Infiniti G35 - Throttle Control Motor Relay Circuit Open - AutoCodes.com
P1126 2003 Infiniti G35 Code - Throttle Control Motor Relay Circuit Open

What are the Possible Causes of the DTC P1126 2003 Infiniti G35?

  • Fualty Throttle Control Motor relay
  • Throttle Control Motor relay harness is open or shorted
  • Throttle Control Motor relay circuit poor electrical connection

How to Fix the DTC P1126 2003 Infiniti G35?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1126 2003 Infiniti G35 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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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