AutoCodes – Nissan – P2100 2008 Nissan Altima Sedan

P2100 2008 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 2008 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 7,847

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 2008 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 2008 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P2100 2008 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2100 2008 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 2008 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 2008 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 2008 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2100 on a 2008 Nissan Altima Sedan?

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

2. What does the OBDII code P2100 indicate in a 2008 Nissan Altima Sedan?

- The code P2100 indicates an issue with the Throttle Control Motor Relay Circuit being open, which can affect the operation of the throttle control system.

3. What are the possible causes of OBDII code P2100 on a 2008 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 itself.

4. How can I diagnose the Throttle Control Motor Relay Circuit Open issue on my 2008 Nissan Altima Sedan?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, inspecting the throttle control motor relay and related wiring, and testing the components for proper functioning.

5. Can I still drive my 2008 Nissan Altima Sedan with OBDII code P2100 present?

- It is not recommended to drive with this code present as it can lead to reduced engine power and potentially unsafe driving conditions. It's best to address the issue promptly.

6. How can I repair the Throttle Control Motor Relay Circuit Open problem on my 2008 Nissan Altima Sedan?

- Repair may involve replacing the faulty throttle control motor relay, repairing damaged wiring or connectors, or replacing the throttle control motor if needed.

7. Is it possible to clear the OBDII code P2100 on a 2008 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 with the throttle control system.

8. Will OBDII code P2100 cause any long-term damage to my 2008 Nissan Altima Sedan if left untreated?

- Ignoring the code can lead to potential long-term damage to the throttle control system and may result in more severe issues down the line. It's best to address it promptly.

9. How much does it typically cost to repair the Throttle Control Motor Relay Circuit Open issue on a 2008 Nissan Altima Sedan?

- Repair costs can vary depending on the exact cause of the issue, but it may range from a simple relay replacement to more extensive repairs involving wiring or component replacement.

10. Can a DIY enthusiast with basic automotive knowledge fix the OBDII code P2100 on a 2008 Nissan Altima Sedan?

- Depending on the exact cause, a DIY enthusiast may be able to address the issue by replacing the throttle control motor relay or checking for damaged wiring. However, more complex issues may require professional assistance.