AutoCodes – Nissan – P2100 2012 Nissan Altima Sedan

P2100 2012 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

Quick Answer

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor Relay, Throttle Actuator Control Motor Relay harness is open. 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: P2100 2012 Nissan Altima Sedan indicates Throttle Control Motor Relay Circuit Open.
Common causes: Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor Relay, Throttle Actuator Control Motor Relay harness is open.
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 6,499

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 Feb 28, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P2100 2012 Nissan Altima Sedan Description

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Power supply for the throttle control motor is provided to the 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. The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to control the throttle actuator and monitor the throttle opening angle in response to driver inputs.

OBDII Code P2100 2012 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P2100 2012 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2100 2012 Nissan Altima Sedan?

Dirty throttle body
Faulty Throttle Actuator Control Motor Relay
Throttle Actuator Control Motor Relay harness is open
Throttle Actuator Control Motor Relay circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2100 2012 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 does this mean?

Code Tech Notes

Check Fuse #43 (see picture)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2100 2012 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 P2100 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2100 in a 2012 Nissan Altima Sedan?

- Common symptoms include the Check Engine light coming on, reduced engine power, and potential difficulty accelerating.

2. What does the OBDII code P2100 "Throttle Control Motor Relay Circuit Open" mean in a 2012 Nissan Altima Sedan?

- This code indicates that there is an open circuit in the relay that controls the throttle control motor.

3. What are the possible causes of OBDII code P2100 in a 2012 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 OBDII code P2100 in my 2012 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 for proper functionality.

5. Can I continue driving my 2012 Nissan Altima Sedan with OBDII code P2100?

- It is not recommended to drive the vehicle with this code present, as it can lead to reduced engine power and potential safety hazards.

6. How do I repair OBDII code P2100 in my 2012 Nissan Altima Sedan?

- The repair process usually involves replacing the faulty throttle control motor relay, repairing or replacing damaged wiring or connectors, and testing the throttle control motor for proper operation.

7. Is it possible to reset the OBDII code P2100 in my 2012 Nissan Altima Sedan without fixing the issue?

- While you can clear the code with an OBDII scanner, it is important to address the underlying problem causing the code to prevent further issues.

8. Can a DIY enthusiast fix OBDII code P2100 in a 2012 Nissan Altima Sedan?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to address this code by replacing the throttle control motor relay or repairing the wiring, but professional help is recommended for accurate diagnosis and repair.

9. Will OBDII code P2100 cause permanent damage to my 2012 Nissan Altima Sedan if left untreated?

- Leaving this code untreated can potentially lead to further damage to the throttle control system and other related components, so it is best to address it promptly.

10. How can I prevent OBDII code P2100 from recurring in my 2012 Nissan Altima Sedan?

- To prevent this code from reappearing, it is essential to ensure proper maintenance of the throttle control system, regularly inspect wiring and connectors, and address any issues promptly to avoid future problems.