AutoCodes – Nissan – P2101 2009 Nissan Altima Sedan

P2101 2009 Nissan Altima Sedan Code - Electric Throttle Control Performance

Quick Answer

The throttle actuator is operated by the Engine Control Module (ECM) and it opens and closes the throttle valve. Common causes include Faulty Electric Throttle Control (ETC) Actuator, Electric Throttle Control (ETC) Actuator harness is open or shorted, Electric Throttle Control (ETC) Actuator circuit poor electrical connection. 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: P2101 2009 Nissan Altima Sedan indicates Electric Throttle Control Performance.
Common causes: Common causes include Faulty Electric Throttle Control (ETC) Actuator, Electric Throttle Control (ETC) Actuator harness is open or shorted, Electric Throttle Control (ETC) Actuator circuit poor electrical connection.
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 3,307

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2101 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 P2101 2009 Nissan Altima Sedan - Electric Throttle Control Performance - AutoCodes.com — P2101 2009 Nissan Altima Sedan Code - Electric Throttle Control Performance

What does this mean?

What are the Possible Causes of the DTC P2101 2009 Nissan Altima Sedan?

Faulty Electric Throttle Control (ETC) Actuator
Electric Throttle Control (ETC) Actuator harness is open or shorted
Electric Throttle Control (ETC) Actuator circuit poor electrical connection

How to Fix the DTC P2101 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2101 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 P2101 2009 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P2101 on a 2009 Nissan Altima Sedan?

- Common symptoms include reduced engine power, acceleration issues, stalling, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P2101 on a 2009 Nissan Altima Sedan?

- The code P2101 typically indicates a problem with the electric throttle control system, which can be caused by a faulty throttle body, wiring issues, a defective throttle position sensor, or a malfunctioning electronic control module.

3. How can I diagnose the electric throttle control system to troubleshoot OBDII code P2101 on my 2009 Nissan Altima Sedan?

- You can use a scan tool to retrieve and interpret the trouble codes, inspect the throttle body for any signs of damage or carbon buildup, check the wiring for any frays or breaks, and test the throttle position sensor for proper functionality.

4. Can a dirty throttle body cause OBDII code P2101 on a 2009 Nissan Altima Sedan?

- Yes, a dirty throttle body can restrict airflow and cause erratic performance of the electric throttle control system, triggering the OBDII code P2101. Regular maintenance, including cleaning the throttle body, can help prevent this issue.

5. How can I repair OBDII code P2101 on my 2009 Nissan Altima Sedan?

- Depending on the underlying cause, repairing the issue may involve cleaning or replacing the throttle body, repairing or replacing damaged wiring, replacing the throttle position sensor, or reprogramming the electronic control module.

6. Is it safe to continue driving with OBDII code P2101 on a 2009 Nissan Altima Sedan?

- It is not recommended to continue driving with OBDII code P2101, as it can lead to further damage to the engine or other components. It is best to address the issue promptly to prevent potential safety hazards.

7. Can I reset OBDII code P2101 on a 2009 Nissan Altima Sedan by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it will not fix the underlying issue causing the code to appear. It is best to diagnose and repair the problem to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code P2101 on a 2009 Nissan Altima Sedan?

- The cost of repairing OBDII code P2101 can vary depending on the specific cause of the issue and the labor rates in your area. It is recommended to consult a mechanic for an accurate estimate based on your vehicle's condition.

9. Can extreme weather conditions affect the electric throttle control system and trigger OBDII code P2101 on a 2009 Nissan Altima Sedan?

- Extreme heat or cold can potentially affect the performance of the electric throttle control system, leading to issues like throttle body icing or sensor malfunctions. Proper maintenance and protection against weather elements can help prevent such problems.

10. Will OBDII code P2101 on a 2009 Nissan Altima Sedan cause the vehicle to fail an emissions test?

- Yes, OBDII code P2101 typically indicates a problem with the throttle control system, which can affect the vehicle's emissions output. It is recommended to address the issue and have the vehicle repaired before undergoing an emissions test.