AutoCodes – GMC – P16A2 2017 GMC Sierra

P16A2 2017 GMC Sierra Code - Throttle Position Sensor Communication Circuit Performance

Quick Answer

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. Common causes include Faulty Throttle Body Assembly, Throttle Body harness is open or shorted, Throttle Body 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: P16A2 2017 GMC Sierra indicates Throttle Position Sensor Communication Circuit Performance.
Common causes: Common causes include Faulty Throttle Body Assembly, Throttle Body harness is open or shorted, Throttle Body 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 167

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 20, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P16A2 2017 GMC Sierra Description

The Throttle Body Assembly contains a contact-less inductive throttle position sensing element that is managed by a customized integrated circuit. The throttle position sensor is mounted within the throttle body assembly and is not serviceable. The Engine Control Module (ECM) supplies the throttle body with a 5 V reference circuit, a low reference circuit. The asynchronous signal means communication is only going from the throttle body to the ECM. The throttle body cannot receive data from the ECM over the signal/serial data circuit. The throttle position sensor provides a signal voltage that changes relative to throttle blade angle. The throttle position sensor information is transmitted between the throttle body and the ECM on the signal/serial data circuit. The ECM decodes the serial data signal and is used as voltages for throttle position sensor 1 and 2. The Diagnostic Trouble Code (DTC) will be set when the ECM detects an incorrect message was received over the throttle position sensor signal circuit for greater than 1 s.

OBDII Code P16A2 2017 GMC Sierra - Throttle Position Sensor Communication Circuit Performance - AutoCodes.com — P16A2 2017 GMC Sierra Code - Throttle Position Sensor Communication Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P16A2 2017 GMC Sierra?

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

How to Fix the DTC P16A2 2017 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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16A2 2017 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.

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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 P16A2 2017 GMC Sierra Code

1. What does the OBDII code P16A2 mean on a 2017 GMC Sierra?

The P16A2 code indicates a problem with the Throttle Position Sensor (TPS) Communication Circuit Performance, meaning the ECU is detecting an issue with data transmission between the TPS and the engine control module.

2. What are the common symptoms of a P16A2 code on a GMC Sierra?

Symptoms may include poor throttle response, reduced engine performance, the Check Engine Light turning on, or the vehicle entering limp mode.

3. What causes the P16A2 code to appear on a 2017 GMC Sierra?

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a malfunctioning engine control module (ECM).

4. Can I drive my 2017 GMC Sierra with a P16A2 code?

Driving with a P16A2 code is not recommended as it can lead to reduced performance, unsafe driving conditions, and potential further damage to the vehicle.

5. How do I diagnose the P16A2 code on my GMC Sierra?

Start by inspecting the TPS wiring and connectors for damage or corrosion. Use a scan tool to monitor TPS data and test the sensor's operation. If needed, check the ECM for faults.

6. What tools are needed to repair a P16A2 code?

You'll typically need an OBDII scan tool, a multimeter for testing electrical circuits, and possibly replacement parts such as the TPS or wiring components.

7. How much does it cost to fix the P16A2 code on a GMC Sierra?

Repair costs vary but may range from $150 to $400, depending on whether the issue involves replacing the TPS, repairing wiring, or addressing ECM problems.

8. Can a dirty throttle body cause a P16A2 code?

While a dirty throttle body is not a direct cause, it can contribute to TPS-related issues by affecting the throttle's operation. Cleaning the throttle body may help if paired with other repairs.

9. How do I clear the P16A2 code after repairs?

Use an OBDII scan tool to clear the code after making the necessary repairs. Drive the vehicle to ensure the issue is resolved and the code does not return.

10. Is a P16A2 code covered under warranty for a 2017 GMC Sierra?

Depending on the mileage and warranty terms, the repair may be covered under a powertrain or emissions warranty. Check with your GMC dealer for details.