AutoCodes – Generic – P2102

P2102 Code - Throttle Actuator 'A' Control Motor Circuit Low

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, Throttle Actuator Control Motor 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: P2102 indicates Throttle Actuator 'A' Control Motor Circuit Low.
Common causes: Common causes include Dirty throttle body, Faulty Throttle Actuator Control Motor, Throttle Actuator Control Motor 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 47,044

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2102 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 the 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 P2102 - Throttle Actuator 'A' Control Motor Circuit Low - AutoCodes.com — P2102 Code - Throttle Actuator 'A' Control Motor Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2102?

Dirty throttle body
Faulty Throttle Actuator Control Motor
Throttle Actuator Control Motor harness is open
Throttle Actuator Control Motor circuit poor electrical connection
Faulty Throttle Actuator Control Motor Relay
Faulty Engine Control Module (ECM)

How to Fix the DTC P2102?

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 P2102 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 P2102 code?

Need more information on how to fix the P2102 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2102 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2102 Buick — Throttle Actuator Control Motor Control Circuit Low Voltage
P2102 Cadillac — Throttle Actuator Control Motor Control Circuit Low Voltage
P2102 Chevrolet — Throttle Actuator Control Motor Control Circuit Low Voltage
P2102 Chrysler — Electronic Throttle Control Motor Circuit Low
P2102 Dodge — Electronic Throttle Control Motor Circuit Low
P2102 GMC — Throttle Actuator Control Motor Control Circuit Low Voltage
P2102 Jeep — Electronic Throttle Control Motor Circuit Low
P2102 Lexus — Throttle Actuator Control Motor Circuit Low
P2102 RAM — Electronic Throttle Control Motor Circuit Low
P2102 Scion — Throttle Actuator Control Motor Circuit Low
P2102 Toyota — Throttle Actuator Control Motor Circuit Low

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 P2102 Code

1. What are the common symptoms of OBDII code P2102?

- Common symptoms of P2102 include poor acceleration, rough idling, stalling, and the vehicle going into limp mode.

2. What does the OBDII code P2102 indicate?

- P2102 indicates a low voltage condition in the circuit that controls the throttle actuator 'A' motor.

3. What are the potential causes of OBDII code P2102?

- The code P2102 can be caused by issues such as a faulty throttle actuator control motor, damaged wiring or connectors, or a malfunctioning PCM.

4. How can I diagnose the cause of OBDII code P2102?

- Diagnosing P2102 involves checking the throttle actuator motor, inspecting the wiring for damage, and testing the voltage at various points in the circuit.

5. Can a dirty throttle body cause OBDII code P2102?

- While a dirty throttle body can cause related issues, such as P2110 or P2112 codes, it is unlikely to directly trigger the P2102 code.

6. Is it safe to drive with OBDII code P2102 present?

- It is not recommended to drive with the P2102 code present, as it can lead to performance issues and potentially unsafe driving conditions.

7. How can I repair OBDII code P2102?

- Repairing P2102 typically involves replacing the throttle actuator control motor, repairing any damaged wiring, or addressing any issues with the PCM.

8. Can resetting the OBDII code P2102 resolve the issue temporarily?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the P2102 code.

9. Are there any DIY fixes for OBDII code P2102?

- DIY fixes for P2102 are limited due to the complexity of the throttle actuator control system. It is best to have a professional diagnose and repair the issue.

10. How much does it cost to repair OBDII code P2102?

- The cost of repairing P2102 can vary depending on the underlying cause, but it may range from $200 to $600 including parts and labor.