AutoCodes – Nissan – P2100 2009 Nissan Altima Sedan

P2100 2009 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 2009 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 4,507

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 2009 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 2009 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P2100 2009 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2100 2009 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 2009 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 2009 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 2009 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2100 on a 2009 Nissan Altima Sedan?

- Common symptoms include the Check Engine Light illuminating, reduced engine power, and potential difficulty accelerating.

2. What can cause the OBDII code P2100 on a 2009 Nissan Altima Sedan?

- The code P2100 typically indicates a problem with the throttle control motor relay circuit being open or malfunctioning.

3. How serious is OBDII code P2100 on a 2009 Nissan Altima Sedan?

- While the vehicle may still be operable with this code, it is important to address it promptly to avoid potential issues with engine performance and safety.

4. Can I continue driving my 2009 Nissan Altima Sedan with OBDII code P2100?

- It is not recommended to continue driving the vehicle with this code present, as it can lead to further damage and potential safety hazards.

5. How can I diagnose the throttle control motor relay circuit open issue on my 2009 Nissan Altima Sedan?

- Diagnosing this issue typically involves checking the throttle control motor relay, wiring connections, and related components for any faults or damage.

6. Is it possible to repair the OBDII code P2100 on a 2009 Nissan Altima Sedan myself?

- While some DIY enthusiasts may be able to address this code with the right tools and knowledge, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. What are some common repair tips for fixing OBDII code P2100 on a 2009 Nissan Altima Sedan?

- Repair tips may include checking and repairing any damaged wiring, replacing the throttle control motor relay if necessary, and clearing the code with an OBDII scanner.

8. Can a faulty throttle control motor relay impact the overall performance of my 2009 Nissan Altima Sedan?

- Yes, a faulty throttle control motor relay can affect the vehicle's performance, leading to issues such as poor acceleration and reduced engine power.

9. How much does it typically cost to repair OBDII code P2100 on a 2009 Nissan Altima Sedan?

- The cost of repairing this code can vary depending on the extent of the issue and the labor rates of the repair shop. It is advisable to obtain a few quotes for accurate pricing.

10. Will resetting the Check Engine Light resolve OBDII code P2100 on my 2009 Nissan Altima Sedan?

- Resetting the Check Engine Light may temporarily turn it off, but the underlying issue causing the code will still need to be addressed to prevent it from reoccurring.