AutoCodes – Nissan – P1126 2004 Nissan Altima Sedan

P1126 2004 Nissan Altima Sedan 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 2004 Nissan Altima Sedan 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.

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Code Popularity 4,792

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 26, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1126 2004 Nissan Altima Sedan 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 2004 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P1126 2004 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P1126 2004 Nissan Altima Sedan?

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 2004 Nissan Altima Sedan?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1126 2004 Nissan Altima Sedan 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 2004 Nissan Altima Sedan Code

What does the OBDII code P1126 mean for a 2004 Nissan Altima Sedan?

P1126 indicates a problem with the throttle control motor relay circuit, specifically that the circuit is open, which can affect the throttle operation.

What symptoms might I experience with the P1126 code?

Common symptoms include a check engine light, reduced engine power, poor acceleration, and potential stalling or hesitation during driving.

What are some potential causes of the P1126 code?

Potential causes include a faulty throttle control motor, an open or shorted throttle control relay circuit, damaged wiring or connectors, or issues with the engine control module (ECM).

How can I diagnose the P1126 code?

To diagnose the P1126 code, check the throttle control motor and relay, inspect wiring and connectors for damage, and use a multimeter to test the circuit for continuity and proper voltage.

What repairs are typically required to fix the P1126 code?

Repairs may involve replacing the throttle control motor, repairing or replacing damaged wiring or connectors, or replacing the throttle control relay.

Can I drive my 2004 Nissan Altima with the P1126 code?

While you can drive the vehicle, it is not recommended as the throttle control issues may lead to reduced engine performance or stalling, which can be dangerous.

How do I reset the check engine light after fixing the P1126 code?

After repairs are made, you can reset the check engine light by using an OBDII scanner to clear the code or by disconnecting the battery for a few minutes.

Is the P1126 code related to other codes?

Yes, the P1126 code may appear alongside other throttle-related codes, indicating broader issues with the throttle control system or related components.

What should I do if the P1126 code keeps reappearing?

If the code reappears after repairs, further diagnostics may be necessary to identify underlying issues, such as problems with the ECM or additional faults in the wiring harness.