AutoCodes – Chevrolet – P16A1 Chevrolet

P16A1 Chevrolet 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 Chevrolet 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 43,121

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 Chevrolet 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 Chevrolet - Throttle Position Sensor Communication Circuit High Voltage - AutoCodes.com — P16A1 Chevrolet Code - Throttle Position Sensor Communication Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16A1 Chevrolet?

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 Chevrolet?

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 Chevrolet 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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Information for Specific Chevrolet Models

P16A1 2014 Chevrolet Silverado — Throttle Position Sensor Communication Circuit High Voltage
P16A1 2015 Chevrolet Silverado — Throttle Position Sensor Communication Circuit High Voltage
P16A1 2016 Chevrolet Silverado — Throttle Position Sensor Communication Circuit High Voltage
P16A1 2017 Chevrolet Silverado — Throttle Position Sensor Communication Circuit High Voltage
P16A1 2018 Chevrolet Silverado — Throttle Position Sensor Communication Circuit High Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage?

- Common symptoms include rough idling, stalling, reduced engine power, and issues with acceleration response.

2. What can cause the OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage?

- The code can be triggered by a faulty throttle position sensor, damaged wiring or connectors, or a malfunction in the engine control module.

3. How can I diagnose the OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage?

- Diagnosing the issue involves checking the throttle position sensor for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to read the code and data related to the sensor.

4. Is it safe to continue driving with the OBDII code P16A1 related to the throttle position sensor communication circuit high voltage in a Chevrolet?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the engine and other components.

5. How can I repair the OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage?

- Repairing the issue may involve replacing the throttle position sensor, repairing damaged wiring or connectors, or reprogramming the engine control module.

6. Can a DIY enthusiast fix the OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage?

- While some DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to seek professional help due to the complexity of the repair and the need for specialized tools.

7. Will resetting the OBDII code P16A1 in a Chevrolet related to the throttle position sensor communication circuit high voltage 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.

8. How much does it typically cost to repair the OBDII code P16A1 related to the throttle position sensor communication circuit high voltage in a Chevrolet?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Are there any preventive measures to avoid triggering the OBDII code P16A1 related to the throttle position sensor communication circuit high voltage in a Chevrolet?

- Regular maintenance, such as checking and cleaning the throttle position sensor, inspecting wiring for damage, and using quality fuel, can help prevent this code from appearing.

10. Can a malfunctioning throttle position sensor communication circuit high voltage affect the overall performance of a Chevrolet vehicle?

- Yes, a malfunctioning throttle position sensor can lead to poor engine performance, reduced fuel efficiency, and drivability issues in a Chevrolet vehicle.