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Engine-Codes – GMC – P16A1 2014 GMC Sierra

P16A1 2014 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

Quick Answer

The P16A1 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Throttle Position Sensor (TPS) communication circuit registering high voltage. Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors in the TPS 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 2014 GMC Sierra indicates Throttle Position Sensor Communication Circuit High Voltage.
Common causes
Common causes include Faulty Throttle Position Sensor, Damaged or corroded wiring/connectors in the TPS 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 18, 2024
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Code P16A1 2014 GMC Sierra Description

The P16A1 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Throttle Position Sensor (TPS) communication circuit registering high voltage. The 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). The ECM uses this data to adjust the air-fuel mixture and control the engine's performance.

OBDII Code P16A1 2014 GMC Sierra - Throttle Position Sensor Communication Circuit High Voltage
P16A1 2014 GMC Sierra Code - Throttle Position Sensor Communication Circuit High Voltage

Common Causes of P16A1 2014 GMC Sierra

  1. Faulty Throttle Position Sensor
  2. Damaged or corroded wiring/connectors in the TPS circuit
  3. ECM malfunction
  4. Throttle body issues
  5. Poor electrical connection

Symptoms of P16A1 2014 GMC Sierra

  1. Rough idling or stalling
  2. Reduced engine power or acceleration
  3. Check Engine Light illuminated
  4. Engine misfires
  5. Poor fuel efficiency

How to Fix P16A1 2014 GMC Sierra

  1. Begin by conducting a thorough inspection of the TPS and its wiring harness to check for any visible damage or corrosion.
  2. Test the TPS using a multimeter to verify its functionality and ensure it is within the specified voltage range.
  3. If the TPS is faulty, replace it with a new sensor following the manufacturer's guidelines.
  4. Check and repair any damaged wiring or connectors in the TPS circuit.
  5. Clear the DTC with a scan tool and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P16A1 2014 GMC Sierra

The cost of repairing a Throttle Position Sensor communication circuit high voltage issue can vary depending on the extent of the problem and the specific components that need to be replaced. In general, the cost of a new TPS sensor ranges from $50 to $150, while labor costs for diagnosis and repair can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $450, including parts and labor. It is recommended to consult with a qualified mechanic or dealership to obtain an accurate estimate based on your vehicle's make and model. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and other factors.

What does this mean?

Tech Notes for P16A1 2014 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 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P16A1 in a 2014 GMC Sierra?

- Common symptoms include poor acceleration, rough idling, stalling, and the check engine light coming on.

2. What causes the Throttle Position Sensor Communication Circuit High Voltage error code in a 2014 GMC Sierra?

- The P16A1 code is typically triggered by a faulty throttle position sensor, wiring issues, or a problem with the engine control module.

3. How can I diagnose the Throttle Position Sensor Communication Circuit High Voltage issue in my 2014 GMC Sierra?

- You can use a diagnostic scanner to read the trouble codes, perform a visual inspection of the sensor and related wiring, and test the sensor's voltage output.

4. Can I drive my 2014 GMC Sierra with the P16A1 code present?

- It is not recommended to drive the vehicle with the P16A1 code active, as it can lead to poor performance and potential safety hazards.

5. How do I repair the Throttle Position Sensor Communication Circuit High Voltage problem in my 2014 GMC Sierra?

- To repair this issue, you may need to replace the throttle position sensor, repair any damaged wiring, or reprogram the engine control module.

6. Are there any DIY tips for fixing the P16A1 code in a 2014 GMC Sierra?

- While some basic troubleshooting like checking connections and wiring can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

7. How much does it cost to fix the Throttle Position Sensor Communication Circuit High Voltage issue in a 2014 GMC Sierra?

- The cost of repairing the P16A1 code can vary depending on the exact cause of the problem, but it may range from $100 to $300 for parts and labor.

8. Will resetting the OBDII code P16A1 in my 2014 GMC Sierra make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not fixed, the code is likely to reappear.

9. Can a bad throttle position sensor cause other problems in my 2014 GMC Sierra besides the P16A1 code?

- Yes, a faulty throttle position sensor can cause issues like poor fuel efficiency, harsh shifting, and overall drivability problems.

10. Is it safe to continue driving my 2014 GMC Sierra if the throttle position sensor communication circuit is showing high voltage?

- It is not recommended to drive the vehicle with this issue unresolved, as it can lead to further damage and potential safety risks.

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