AutoCodes – GMC – P2101 GMC

P2101 GMC Code - Throttle Actuator Position Performance

Quick Answer

The Engine Control Module (ECM) determines the driver's intent based on input from the accelerator pedal position sensors, then calculates the appropriate throttle response based on the throttle position sensors. Common causes include Binding or bent Throttle Plate, Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted. 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 GMC indicates Throttle Actuator Position Performance .
Common causes: Common causes include Binding or bent Throttle Plate, Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted.
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 22,471

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 Aug 13, 2022

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

The Engine Control Module (ECM) determines the driver's intent based on input from the accelerator pedal position sensors, then calculates the appropriate throttle response based on the throttle position sensors. The ECM controls the throttle valve by applying a varying voltage to the control circuits of the Throttle Actuator Control (TAC) motor. The ECM monitors the duty cycle that is required to actuate the throttle valve. The ECM monitors the TP sensor signal/serial data circuit to determine the actual throttle valve position. The TP sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the actual throttle position does not match the predicted throttle position for greater than 1 s.

OBDII Code P2101 GMC - Throttle Actuator Position Performance - AutoCodes.com — P2101 GMC Code - Throttle Actuator Position Performance

What does this mean?

What are the Possible Causes of the DTC P2101 GMC?

Binding or bent Throttle Plate
Faulty Throttle Body Assembly
Throttle Body Assembly harness is open or shorted
Throttle Body Assembly circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2101 GMC?

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 does this mean?

Code Tech Notes

There is a factory service bulletin for the P2101 code on the following GMC vehicles:

2004-2012 GMC Canyon
2002-2009 GMC Envoy
GMC Canyon, Envoy Factory Service Bulletin OBDII Code P2101

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2101 GMC 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 P2101 GMC code?

Need more information on how to fix the P2101 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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

Information for Specific GMC Models

P2101 2014 GMC Sierra — Throttle Actuator Position Performance
P2101 2015 GMC Sierra — Throttle Actuator Position Performance
P2101 2016 GMC Sierra — Throttle Actuator Position Performance
P2101 2017 GMC Sierra — Throttle Actuator Position Performance
P2101 2018 GMC Sierra — Throttle Actuator Position Performance

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 GMC Code

1. What are the common symptoms of OBDII code P2101 (Throttle Actuator Position Performance)?

- Common symptoms include reduced engine power, stalling, rough idle, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2101 (Throttle Actuator Position Performance)?

- Possible causes include a faulty throttle actuator, damaged wiring or connectors, a dirty throttle body, or issues with the throttle position sensor.

3. How can I diagnose OBDII code P2101 (Throttle Actuator Position Performance)?

- Diagnosis typically involves scanning the vehicle for codes, inspecting the throttle actuator and related components, and testing the throttle position sensor.

4. Can a dirty throttle body cause OBDII code P2101 (Throttle Actuator Position Performance)?

- Yes, a dirty throttle body can cause issues with the throttle actuator's performance, leading to the triggering of code P2101.

5. What are some repair tips for fixing OBDII code P2101 (Throttle Actuator Position Performance)?

- Repair tips include cleaning the throttle body, inspecting and repairing any damaged wiring or connectors, and replacing the throttle actuator if necessary.

6. Is it safe to continue driving with OBDII code P2101 (Throttle Actuator Position Performance) present?

- It is not recommended to continue driving with this code present, as it can lead to further damage and safety issues. It's best to address the underlying problem promptly.

7. Can a faulty throttle position sensor trigger OBDII code P2101 (Throttle Actuator Position Performance)?

- Yes, a faulty throttle position sensor can cause irregular readings and performance issues with the throttle actuator, resulting in the P2101 trouble code.

8. How much does it typically cost to repair OBDII code P2101 (Throttle Actuator Position Performance)?

- The cost of repairs for this code can vary depending on the exact cause and the labor rates in your area. It's recommended to get a diagnosis from a qualified mechanic for an accurate estimate.

9. Will disconnecting the battery reset OBDII code P2101 (Throttle Actuator Position Performance)?

- Disconnecting the battery may temporarily clear the code, but it will likely return if the underlying issue is not addressed. It's best to diagnose and repair the problem to prevent the code from recurring.

10. Can a software update fix OBDII code P2101 (Throttle Actuator Position Performance)?

- In some cases, a software update from the manufacturer may address issues related to the throttle actuator position performance, potentially resolving the P2101 trouble code.