AutoCodes – Honda – P2101 Honda

P2101 Honda Code - Electronic Throttle Control System Malfunction

Quick Answer

The Electronic Throttle Control System (ETCS) controls the throttle valve opening. Common causes include Faulty Throttle Actuator Control Actuator, Throttle Actuator Control Actuator harness is open or shorted, Throttle Actuator Control 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 Honda indicates Electronic Throttle Control System Malfunction.
Common causes: Common causes include Faulty Throttle Actuator Control Actuator, Throttle Actuator Control Actuator harness is open or shorted, Throttle Actuator Control 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 64,720

How popular is this code, among other codes? Medium

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 Oct 09, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2101 Honda Description

The Electronic Throttle Control System (ETCS) controls the throttle valve opening. The system is composed of the throttle actuator, the throttle valve, Throttle Position (TP) sensors A and B, the throttle actuator control module, the throttle actuator control module relay, the Accelerator Pedal Position (APP) sensor, and the Powertrain Control Module (PCM). The Accelerator Pedal Position (APP) sensor is operated via the throttle cable to determine the accelerator opening value when the driver presses the accelerator pedal. The accelerator pedal opening value is converted to a signal in the APP sensor and transmitted to the PCM to compute the target position. The target position signal is then transmitted to the throttle actuator control module. The throttle actuator control module determines the throttle valve target position according to the signal received and operates the throttle actuator to move the throttle valve to the target position. The actual throttle valve position is determined by TP sensor A installed in the throttle body. The throttle actuator control module compares the throttle valve target opening angle and the actual throttle valve opening angle from TP sensor A, and when the difference exceeds the specification, the throttle actuator control module transmits the malfunction data to the PCM. When the PCM receives the malfunction data from the throttle actuator control module, the PCM detects the malfunction of the throttle actuator system and a DTC is stored.

OBDII Code P2101 Honda - Electronic Throttle Control System Malfunction - AutoCodes.com — P2101 Honda Code - Electronic Throttle Control System Malfunction

What does this mean?

What are the Possible Causes of the DTC P2101 Honda?

Faulty Throttle Actuator Control Actuator
Throttle Actuator Control Actuator harness is open or shorted
Throttle Actuator Control Actuator circuit poor electrical connection

How to Fix the DTC P2101 Honda?

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 Honda 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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Need Help with the Code?

Get the P2101 Honda code diagnosed by a professional: Find a repair shop in your area

Information for Specific Honda Models

P2101 2008 Honda Accord — Throttle Actuator System Malfunction
P2101 2009 Honda Accord — Throttle Actuator System Malfunction
P2101 2010 Honda Accord — Throttle Actuator System Malfunction

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 Honda Code

1. What are the common symptoms of OBDII code P2101 in a Honda related to Electronic Throttle Control System Malfunction?

- Common symptoms include reduced engine power, difficulty accelerating, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2101 in a Honda?

- The code P2101 in a Honda is often caused by issues with the electronic throttle control system, such as a faulty throttle body, wiring issues, or a malfunctioning throttle position sensor.

3. How can I diagnose the Electronic Throttle Control System Malfunction causing OBDII code P2101 in my Honda?

- Diagnosing the issue typically involves checking the throttle body for dirt or debris, testing the throttle position sensor, inspecting the wiring for any damage, and scanning for related error codes.

4. Can a dirty throttle body trigger OBDII code P2101 in a Honda?

- Yes, a dirty throttle body can disrupt the proper functioning of the electronic throttle control system, leading to the triggering of OBDII code P2101.

5. Is it safe to continue driving my Honda with OBDII code P2101 related to Electronic Throttle Control System Malfunction?

- It is not recommended to continue driving the vehicle with OBDII code P2101, as it can lead to further damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P2101 in my Honda due to Electronic Throttle Control System Malfunction?

- Repair options may include cleaning the throttle body, replacing the throttle position sensor, repairing damaged wiring, or recalibrating the throttle control system.

7. Can resetting the ECU clear OBDII code P2101 in a Honda?

- Resetting the ECU may temporarily clear the code, but if the underlying issue causing the Electronic Throttle Control System Malfunction is not addressed, the code is likely to reappear.

8. Are there any DIY fixes for OBDII code P2101 in a Honda?

- Some DIY fixes include cleaning the throttle body, inspecting and repairing damaged wiring, and checking the throttle position sensor for proper functioning.

9. How much does it cost to repair OBDII code P2101 related to Electronic Throttle Control System Malfunction in a Honda?

- The cost of repair can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars if professional assistance is required.

10. Can a mechanic determine the exact cause of OBDII code P2101 in a Honda?

- A qualified mechanic can perform diagnostic tests to pinpoint the exact cause of the Electronic Throttle Control System Malfunction triggering OBDII code P2101 in a Honda.