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Engine-Codes – GMC – P16A1 2016 GMC Sierra

P16A1 2016 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

Quick Answer

The P16A1 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a Throttle Position Sensor Communication Circuit High Voltage issue. Common causes include Faulty throttle position sensor, Damaged or corroded wiring in the communication circuit, ECM malfunction. 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 position sensor, Damaged or corroded wiring in the communication circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P16A1 2016 GMC Sierra Description

The P16A1 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a Throttle Position Sensor Communication Circuit High Voltage issue. The throttle position sensor (TPS) is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). When the ECM detects a high voltage signal from the TPS communication circuit, it triggers the P16A1 code.

OBDII Code P16A1 2016 GMC Sierra - Throttle Position Sensor Communication Circuit High Voltage
P16A1 2016 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

Common Causes of P16A1 2016 GMC Sierra

  1. Faulty throttle position sensor
  2. Damaged or corroded wiring in the communication circuit
  3. ECM malfunction
  4. Poor electrical connection between TPS and ECM
  5. Water or debris intrusion affecting TPS operation

Symptoms of P16A1 2016 GMC Sierra

  1. Engine hesitation or surging during acceleration
  2. Rough idling or stalling
  3. Reduced fuel efficiency
  4. Check Engine Light illuminated on the dashboard
  5. Difficulty starting the vehicle

How to Fix P16A1 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the throttle position sensor, wiring, and ECM to identify any visible damage or corrosion.
  2. Use a multimeter to test the voltage output of the TPS and ensure it is within the manufacturer's specified range.
  3. Check the wiring harness for any breaks, fraying, or loose connections, repairing or replacing as needed.
  4. If the TPS is determined to be faulty, replace it with a new sensor following the manufacturer's guidelines.
  5. Clear the DTC from the ECM memory using a diagnostic scan tool and perform a test drive to verify that the issue has been resolved.

Cost to Fix P16A1 2016 GMC Sierra

The typical repair costs for addressing a Throttle Position Sensor Communication Circuit High Voltage issue can vary depending on the specific cause of the problem and the labor rates in your area. In general, replacing a faulty throttle position sensor can cost between $100 and $300, while addressing wiring or ECM issues may increase the total repair cost. Additionally, labor rates at auto repair shops can range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas. It is advisable to consult with local repair shops to obtain a more accurate estimate based on your vehicle make and model.

What does this mean?

Tech Notes for P16A1 2016 GMC Sierra









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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.

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