AutoCodes – GMC – P16A1 2015 GMC Sierra

P16A1 2015 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

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 Assembly harness is open or shorted, Throttle Body Assembly 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: P16A1 2015 GMC Sierra indicates Throttle Position Sensor Communication Circuit High Voltage.
Common causes: Common causes include Faulty Throttle Body Assembly, Throttle Body Assembly harness is open or shorted, Throttle Body Assembly 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 408

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P16A1 2015 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 a high voltage circuit condition on the throttle position sensor signal circuit for greater than 1 s.

OBDII Code P16A1 2015 GMC Sierra - Throttle Position Sensor Communication Circuit High Voltage - AutoCodes.com — P16A1 2015 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16A1 2015 GMC Sierra?

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 P16A1 2015 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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16A1 2015 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 P16A1 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P16A1 in a 2015 GMC Sierra?

The common symptoms of code P16A1 include poor engine performance, rough idling, stalling, and potential difficulty accelerating.

2. What does the OBDII code P16A1 indicate in a 2015 GMC Sierra?

Code P16A1 indicates an issue with the Throttle Position Sensor Communication Circuit registering high voltage in a 2015 GMC Sierra.

3. What are the possible causes of OBDII code P16A1 in a 2015 GMC Sierra?

Possible causes of code P16A1 include a faulty throttle position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module.

4. How can I diagnose the Throttle Position Sensor Communication Circuit issue in my 2015 GMC Sierra?

Diagnosing the issue involves checking the throttle position sensor for proper operation, inspecting the sensor circuit wiring for any damage or loose connections, and scanning the ECM for related error codes.

5. Can I still drive my 2015 GMC Sierra with OBDII code P16A1?

It is not recommended to drive your vehicle with code P16A1, as it can lead to further damage and potential safety hazards. It is advised to address the issue promptly.

6. What are some repair tips for fixing OBDII code P16A1 in a 2015 GMC Sierra?

Repair tips include replacing the throttle position sensor if faulty, repairing any damaged wiring or connectors, and resetting the ECM after making necessary repairs.

7. How much does it typically cost to repair OBDII code P16A1 in a 2015 GMC Sierra?

The cost of repairing code P16A1 can vary depending on the extent of the issue and whether you choose to do the repairs yourself or take your vehicle to a professional mechanic. Costs may include parts and labor expenses.

8. Can a DIY enthusiast fix OBDII code P16A1 in a 2015 GMC Sierra?

If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to fix code P16A1 yourself. However, if you are unsure, it is best to seek professional help.

9. Will resetting the check engine light resolve OBDII code P16A1 in a 2015 GMC Sierra?

Simply resetting the check engine light will not fix the underlying issue causing code P16A1. It is essential to diagnose the problem, make necessary repairs, and clear the error code properly.

10. How urgent is it to address OBDII code P16A1 in a 2015 GMC Sierra?

It is recommended to address code P16A1 promptly to prevent potential further damage to your vehicle and ensure optimal performance. Ignoring the issue can lead to more severe problems down the line.