AutoCodes – GMC – P1516 2018 GMC Sierra

P1516 2018 GMC Sierra Code - Throttle Actuator Control Module 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: P1516 2018 GMC Sierra indicates Throttle Actuator Control Module 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 286

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 P1516 2018 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 an unstable throttle position for greater than 1 s.

OBDII Code P1516 2018 GMC Sierra - Throttle Actuator Control Module Throttle Actuator Position Performance - AutoCodes.com — P1516 2018 GMC Sierra Code - Throttle Actuator Control Module Throttle Actuator Position Performance

What does this mean?

What are the Possible Causes of the DTC P1516 2018 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 P1516 2018 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 P1516 2018 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 P1516 2018 GMC Sierra code?

Need more information on how to fix the P1516 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1516 2018 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 P1516 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P1516 in a 2018 GMC Sierra related to the Throttle Actuator Control Module Throttle Actuator Position Performance?

- Common symptoms include reduced engine power, illuminated Check Engine Light, and difficulty accelerating.

2. What are the possible causes of OBDII code P1516 in a 2018 GMC Sierra?

- Possible causes include a faulty throttle body, damaged wiring or connectors, software issues, or a malfunctioning throttle actuator control module.

3. How can I diagnose the issue related to OBDII code P1516 in my 2018 GMC Sierra?

- Diagnosis typically involves scanning the vehicle's onboard diagnostic system for the specific trouble code, inspecting the throttle body and related components for damage, and testing the throttle actuator control module.

4. Can I continue driving my 2018 GMC Sierra with OBDII code P1516?

- It is not recommended to continue driving with this code as it can lead to reduced engine performance and potentially unsafe driving conditions.

5. How can I repair OBDII code P1516 in my 2018 GMC Sierra?

- Repair options may include cleaning or replacing the throttle body, repairing damaged wiring or connectors, reprogramming the control module, or replacing the throttle actuator control module.

6. Is it possible to clear the OBDII code P1516 in a 2018 GMC Sierra without addressing the underlying issue?

- Clearing the code without fixing the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely reoccur, and the vehicle may continue to experience performance issues.

7. Can a DIY enthusiast fix OBDII code P1516 in a 2018 GMC Sierra?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides and using diagnostic equipment.

8. How much does it typically cost to repair OBDII code P1516 in a 2018 GMC Sierra at a professional auto repair shop?

- Repair costs can vary based on the specific issue, labor rates, and parts needed, but the total repair cost may range from a few hundred to over a thousand dollars.

9. Are there any preventive maintenance measures to avoid OBDII code P1516 in a 2018 GMC Sierra?

- Regularly inspecting and cleaning the throttle body, checking for damaged wiring, and ensuring proper maintenance of the throttle actuator control module can help prevent this issue.

10. How long does it usually take to repair OBDII code P1516 in a 2018 GMC Sierra?

- The repair time can vary depending on the extent of the issue and the availability of parts, but it may take a few hours to a full day for a professional mechanic to diagnose and fix the problem.