AutoCodes – Acura – P2101 Acura

P2101 Acura 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 Acura 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 24,702

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

What does this mean?

What are the Possible Causes of the DTC P2101 Acura?

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 Acura?

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 Acura 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 Acura Code

1. What does the OBDII code P2101 mean for an Acura?

P2101 indicates a malfunction in the Electronic Throttle Control System, specifically the throttle actuator control motor performance.

2. What are the common symptoms of code P2101 in an Acura?

Symptoms include reduced engine power, poor acceleration, the throttle not responding properly, and the Check Engine Light being illuminated.

3. What causes the P2101 code to appear in an Acura?

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

4. Can I drive my Acura with the P2101 code?

Driving with the P2101 code is not recommended, as it can lead to reduced engine performance and potentially unsafe driving conditions.

5. How can I troubleshoot the P2101 code on my Acura?

Start by inspecting the throttle body for dirt or carbon buildup, checking wiring and connectors for damage, and testing the throttle actuator motor and position sensors.

6. Does cleaning the throttle body help fix P2101 on an Acura?

Yes, cleaning the throttle body can help if the issue is caused by carbon buildup or dirt obstructing the throttle plate.

7. How much does it cost to repair the P2101 code on an Acura?

Repair costs vary but can range from $100 to $500, depending on whether cleaning, wiring repairs, or throttle body replacement is required.

8. Can a weak battery cause the P2101 code on an Acura?

A weak or failing battery can sometimes cause communication or voltage issues, which may trigger the P2101 code.

9. Will resetting the Check Engine Light clear the P2101 code permanently?

Simply resetting the light won't fix the underlying issue. The code will likely return unless the root cause is addressed.

10. Is the P2101 code covered under warranty on an Acura?

It depends on your vehicle's age, mileage, and warranty coverage. Check with your dealer to see if the repair falls under a powertrain or emissions warranty.