AutoCodes – Nissan – P2100 2010 Nissan Altima Sedan

P2100 2010 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 2010 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 5,381

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 2010 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 2010 Nissan Altima Sedan - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P2100 2010 Nissan Altima Sedan Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2100 2010 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 2010 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 2010 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 2010 Nissan Altima Sedan Code

1. What does the OBDII code P2100 mean on a 2010 Nissan Altima?

P2100 indicates an issue with the Throttle Control Motor Relay Circuit being open, meaning the circuit is not functioning properly to control the throttle motor.

2. What are common symptoms of a P2100 code in a 2010 Nissan Altima?

Symptoms may include reduced engine power, the throttle not responding to inputs, the Check Engine Light illuminating, and potential stalling.

3. What causes the P2100 code to appear in a 2010 Nissan Altima?

Common causes include a faulty throttle motor relay, damaged wiring or connectors in the throttle control motor circuit, a malfunctioning throttle body, or a failing Engine Control Module (ECM).

4. Can a P2100 code cause drivability issues in my 2010 Nissan Altima?

Yes, it can cause reduced power, hesitation, difficulty accelerating, or even prevent the vehicle from starting in some cases.

5. How do I diagnose the P2100 code on a 2010 Nissan Altima?

Start by inspecting the throttle control motor relay, wiring, and connectors for damage. Use a multimeter to test circuit continuity and check the operation of the throttle body and ECM.

6. Can I drive my 2010 Nissan Altima with a P2100 code?

Driving with this code is not recommended, as it can lead to unsafe driving conditions due to unresponsive throttle control or reduced power.

7. How much does it cost to repair the P2100 code on a 2010 Nissan Altima?

Repair costs vary, but replacing a throttle motor relay typically costs $50-$200 for parts and labor. More extensive repairs, like replacing the throttle body or ECM, can cost $400-$1,000 or more.

8. How can I fix a P2100 code on my 2010 Nissan Altima?

Repairs may involve replacing the throttle motor relay, repairing or replacing damaged wiring or connectors, cleaning or replacing the throttle body, or reprogramming or replacing the ECM.

9. Is a P2100 code related to other throttle control issues in a 2010 Nissan Altima?

Yes, the P2100 code is part of the throttle control system and may occur with other related codes, such as P2101 or P2119, which can indicate further issues with throttle operation.

10. Will resetting the ECM clear the P2100 code on a 2010 Nissan Altima?

Resetting the ECM may temporarily clear the code, but it will likely return if the underlying issue with the throttle control motor relay circuit is not resolved.