AutoCodes – Nissan – P2100 2008 Nissan Sentra

P2100 2008 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 2008 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 3,231

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

What does this mean?

What are the Possible Causes of the DTC P2100 2008 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 2008 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 2008 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 2008 Nissan Sentra code?

Need more information on how to fix the P2100 2008 Nissan Sentra code? Get Access to Factory Service Manuals

Need Help with the 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 2008 Nissan Sentra Code

What are common symptoms of OBDII code P2100 in a 2008 Nissan Sentra?

Common symptoms include the vehicle going into limp mode, reduced engine power, and the Check Engine Light illuminating.

What are possible causes of OBDII code P2100 in a 2008 Nissan Sentra?

Possible causes include a faulty throttle control motor relay, damaged wiring or connectors in the circuit, or a malfunctioning throttle body.

How can I diagnose the throttle control motor relay circuit open issue in a 2008 Nissan Sentra?

Diagnosing this issue involves checking the throttle control motor relay for proper operation, inspecting the wiring and connectors for damage, and using a multimeter to test for continuity in the circuit.

Can a DIY enthusiast repair the OBDII code P2100 in a 2008 Nissan Sentra?

While some DIY enthusiasts may be able to address this issue by replacing the throttle control motor relay or repairing damaged wiring, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

Is it safe to continue driving with OBDII code P2100 in a 2008 Nissan Sentra?

It is not recommended to continue driving with this code present, as it can lead to further damage to the vehicle and potentially unsafe driving conditions due to reduced engine power.

What is the typical cost to repair OBDII code P2100 in a 2008 Nissan Sentra?

The cost of repairing this code can vary depending on the underlying cause, but it may range from $100 to $300 for parts and labor at a repair shop.

Can resetting the OBDII code P2100 in a 2008 Nissan Sentra make it go away permanently?

Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven again.

What are the long-term effects of ignoring OBDII code P2100 in a 2008 Nissan Sentra?

Ignoring this code can lead to decreased fuel efficiency, engine performance issues, and potential damage to other components in the throttle control system over time.

Should I replace the throttle body if OBDII code P2100 appears in a 2008 Nissan Sentra?

While a faulty throttle body can cause this code, it is recommended to diagnose the specific issue first before replacing any parts to avoid unnecessary expenses.