AutoCodes – GMC – P16A1 2016 GMC Sierra

P16A1 2016 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 2016 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 452

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 2016 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 2016 GMC Sierra - Throttle Position Sensor Communication Circuit High Voltage - AutoCodes.com — P16A1 2016 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16A1 2016 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 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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16A1 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.

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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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P16A1 in a 2016 GMC Sierra?

- Common symptoms include poor acceleration, rough idling, stalling, and possibly reduced fuel efficiency.

2. What does the OBDII code P16A1 in a 2016 GMC Sierra indicate?

- The code P16A1 indicates a Throttle Position Sensor Communication Circuit High Voltage issue.

3. What are the potential causes of OBDII code P16A1 in a 2016 GMC Sierra?

- Potential causes include a faulty throttle position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).

4. How can I diagnose the Throttle Position Sensor Communication Circuit High Voltage issue in my 2016 GMC Sierra?

- You can use a diagnostic scanner to read the OBDII code P16A1 and then perform a thorough inspection of the throttle position sensor, wiring, and connectors for any visible damage.

5. Can I drive my 2016 GMC Sierra with OBDII code P16A1?

- It is not recommended to drive your vehicle with this code as it can lead to further damage and potential safety hazards.

6. How can I reset the OBDII code P16A1 in my 2016 GMC Sierra?

- You can reset the code using an OBDII scanner or by disconnecting the battery for a few minutes. However, it's important to address the underlying issue causing the code.

7. Is it possible to repair the Throttle Position Sensor Communication Circuit High Voltage issue in a 2016 GMC Sierra myself?

- Depending on your mechanical skills, you may be able to replace the throttle position sensor or repair wiring issues yourself. However, it's recommended to seek professional help for accurate diagnosis and repair.

8. How much does it cost to repair OBDII code P16A1 in a 2016 GMC Sierra?

- The cost of repair can vary based on the underlying cause of the issue. It may range from a few hundred dollars for sensor replacement to more for ECM-related problems.

9. Will the check engine light turn off automatically after fixing OBDII code P16A1 in a 2016 GMC Sierra?

- In most cases, the check engine light should turn off after the issue is resolved and the code is cleared. If it persists, further diagnosis may be needed.

10. Can a faulty throttle position sensor cause other issues in a 2016 GMC Sierra besides code P16A1?

- Yes, a faulty throttle position sensor can cause a range of performance issues such as poor acceleration, erratic shifting, and even engine stalling in addition to triggering code P16A1.