AutoCodes – Nissan – P2100 2009 Nissan Sentra

P2100 2009 Nissan Sentra 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 Sentra 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 2,598

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
Cost to Diagnose
FAQs
Comments
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Code P2100 2009 Nissan Sentra 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 Sentra - Throttle Control Motor Relay Circuit Open - AutoCodes.com — P2100 2009 Nissan Sentra Code - Throttle Control Motor Relay Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2100 2009 Nissan Sentra?

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 Sentra?

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 P2100 2009 Nissan Sentra 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.

Need more information about the P2100 2009 Nissan Sentra code?

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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 Sentra Code

What does the OBDII code P2100 mean for a 2009 Nissan Sentra?

The P2100 code indicates that there is an open circuit in the throttle control motor relay, affecting the electronic throttle control system.

What symptoms might I experience with the P2100 code?

Common symptoms include reduced engine power, the vehicle entering limp mode, and the check engine light illuminating.

What could cause the P2100 code to trigger?

Possible causes include a faulty throttle control motor relay, damaged wiring or connectors, or issues within the throttle body itself.

How can I diagnose the issue related to the P2100 code?

You can start by inspecting the throttle control motor relay and its wiring for any visible damage, followed by testing the relay with a multimeter to ensure it is functioning properly.

Is it safe to drive a 2009 Nissan Sentra with a P2100 code?

It is not recommended to drive the vehicle in this condition, as it may enter limp mode, limiting engine power and potentially creating unsafe driving conditions.

What are some common repair options for the P2100 code?

Repairs may include replacing the throttle control motor relay, repairing any damaged wiring, or replacing the throttle body if it is found to be defective.

Can I clear the P2100 code after performing repairs?

Yes, you can clear the code using an OBDII scanner after addressing the underlying issue, but it is important to ensure the problem is fully resolved to prevent the code from reappearing.

How much does it typically cost to fix the P2100 code?

Repair costs can vary widely depending on the specific problem, but replacing the throttle control motor relay may range from $50 to $200, including parts and labor.

Are there any preventative measures to avoid the P2100 code?

Regular maintenance of the vehicle's electrical system and keeping an eye on the throttle body and related components can help prevent issues that lead to the P2100 code.