AutoCodes – GMC – P2101 2016 GMC Sierra

P2101 2016 GMC Sierra 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 2016 GMC Sierra 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 236

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
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2101 2016 GMC Sierra 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 2016 GMC Sierra - Throttle Actuator Position Performance - AutoCodes.com — P2101 2016 GMC Sierra Code - Throttle Actuator Position Performance

What does this mean?

What are the Possible Causes of the DTC P2101 2016 GMC Sierra?

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 2016 GMC Sierra?

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 2016 GMC Sierra 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 2016 GMC Sierra code?

Need more information on how to fix the P2101 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2101 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2016 GMC Sierra Code

1. What does the OBDII code P2101 mean on a 2016 GMC Sierra?

P2101 indicates a problem with the throttle actuator control (TAC) system, specifically a performance issue with the throttle actuator position.

2. What are the symptoms of code P2101 in a 2016 GMC Sierra?

Common symptoms include reduced engine power, a lack of throttle response, the check engine light being illuminated, and the vehicle entering "limp mode."

3. What causes the P2101 code to appear on my 2016 GMC Sierra?

Potential causes include a faulty throttle body, damaged wiring or connectors in the throttle actuator circuit, a defective throttle position sensor, or a malfunctioning powertrain control module (PCM).

4. Can I drive my 2016 GMC Sierra with the P2101 code?

Driving with the P2101 code is not recommended, as the vehicle may experience reduced power or throttle response, which can be a safety risk.

5. How is the P2101 code diagnosed on a 2016 GMC Sierra?

A technician will use a scan tool to check for related codes, visually inspect the throttle body and wiring, and test the throttle position sensor and actuator for proper operation.

6. How do I fix the P2101 code on my 2016 GMC Sierra?

Fixes may include cleaning or replacing the throttle body, repairing or replacing damaged wiring or connectors, or reprogramming/replacing the PCM if necessary.

7. How much does it cost to repair the P2101 code on a 2016 GMC Sierra?

Repair costs vary but typically range from $200 to $600, depending on whether the throttle body, wiring, or PCM needs replacement.

8. Can a dirty throttle body cause the P2101 code on my 2016 GMC Sierra?

Yes, carbon buildup in the throttle body can restrict movement and cause the P2101 code. Cleaning the throttle body may resolve the issue.

9. Will disconnecting the battery clear the P2101 code on a 2016 GMC Sierra?

Disconnecting the battery may temporarily clear the code, but the underlying issue must be addressed to prevent the code from returning.

10. Is the P2101 code common on 2016 GMC Sierra trucks?

While not extremely common, the P2101 code can occur in vehicles with throttle actuator issues or poor maintenance of the throttle body. Regular inspections can help prevent it.