AutoCodes – GMC – P16A2 GMC

P16A2 GMC 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 GMC 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 4,370

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

What does this mean?

What are the Possible Causes of the DTC P16A2 GMC?

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 GMC?

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 P16A2 GMC 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.

Need more information about the P16A2 GMC code?

Need more information on how to fix the P16A2 GMC code? Get Access to Factory Service Manuals

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Information for Specific GMC Models

P16A2 2014 GMC Sierra — Throttle Position Sensor Communication Circuit Performance
P16A2 2015 GMC Sierra — Throttle Position Sensor Communication Circuit Performance
P16A2 2016 GMC Sierra — Throttle Position Sensor Communication Circuit Performance
P16A2 2017 GMC Sierra — Throttle Position Sensor Communication Circuit Performance
P16A2 2018 GMC Sierra — Throttle Position Sensor Communication Circuit Performance

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 GMC Code

1. What are the common symptoms of OBDII code P16A2 in a GMC related to the Throttle Position Sensor Communication Circuit Performance?

- Common symptoms include poor engine performance, rough idling, stalling, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P16A2 in a GMC?

- The code P16A2 can be triggered by issues such as a faulty throttle position sensor, damaged wiring or connectors in the communication circuit, or a malfunctioning engine control module (ECM).

3. How can I diagnose the Throttle Position Sensor Communication Circuit Performance issue in a GMC when P16A2 is present?

- Diagnosing this issue typically involves using a scan tool to monitor sensor data, inspecting the throttle position sensor and its wiring for damage, and checking the ECM for any communication errors.

4. Are there any simple repairs or checks I can perform myself to address OBDII code P16A2 in my GMC?

- You can start by visually inspecting the throttle position sensor and its wiring for any obvious damage or corrosion. Ensure all connections are secure and clean. If no issues are found, consider seeking professional help for a more in-depth diagnosis.

5. Can driving with OBDII code P16A2 in a GMC cause any further damage to the vehicle?

- Continuing to drive with code P16A2 may lead to further fuel inefficiency, engine performance issues, and potential damage to other components over time. It is recommended to address the underlying problem promptly.

6. Will resetting the Check Engine Light make OBDII code P16A2 go away in a GMC?

- Resetting the Check Engine Light will clear the code temporarily, but it will likely reappear if the root cause of the Throttle Position Sensor Communication Circuit Performance issue is not addressed.

7. How crucial is it to repair OBDII code P16A2 related to the Throttle Position Sensor Communication Circuit Performance in a GMC?

- It is essential to address code P16A2 promptly to ensure optimal engine performance, fuel efficiency, and overall vehicle reliability. Ignoring the issue may lead to more severe problems down the line.

8. Is it safe to drive my GMC with OBDII code P16A2 present?

- While it may be safe to drive your GMC with the code P16A2 present in the short term, it is advisable to address the underlying issue as soon as possible to prevent any further complications or potential breakdowns.

9. Can extreme weather conditions affect the performance of the Throttle Position Sensor Communication Circuit in a GMC?

- Extreme weather conditions such as excessive heat or cold can potentially impact the performance of the throttle position sensor and its communication circuit, leading to issues that trigger code P16A2.

10. How much can I expect to pay for repairing OBDII code P16A2 related to the Throttle Position Sensor Communication Circuit in a GMC?

- The cost of repairing code P16A2 can vary depending on the underlying cause and the labor rates in your area. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.