AutoCodes – Buick – P16A2 Buick

P16A2 Buick 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 Buick 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 1,082

How popular is this code, among other codes? Low

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
Cost to Diagnose
FAQs
Comments
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Code P16A2 Buick 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 Buick - Throttle Position Sensor Communication Circuit Performance - AutoCodes.com — P16A2 Buick Code - Throttle Position Sensor Communication Circuit Performance

What does this mean?

What are the Possible Causes of the DTC P16A2 Buick?

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 Buick?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16A2 Buick 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 P16A2 Buick Code

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

The common symptoms include reduced engine performance, rough idling, stalling, and the illumination of the Check Engine Light.

2. What are the possible causes of the OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

Possible causes include a faulty throttle position sensor, damaged wiring or connectors in the communication circuit, or an issue with the engine control module.

3. How can I diagnose the OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

You can diagnose this code by using an OBDII scanner to retrieve the fault code, inspecting the throttle position sensor and its wiring for any damage, and testing the communication circuit for proper functionality.

4. What are some repair tips for addressing OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

Repair tips include replacing a faulty throttle position sensor, repairing damaged wiring or connectors, and reprogramming the engine control module if necessary.

5. Can driving with the OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance cause further damage?

Continuing to drive with this code may lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components over time. It is recommended to address the issue promptly.

6. How much does it typically cost to repair OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Are there any preventive measures to avoid encountering OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

Regularly maintaining and inspecting the throttle position sensor, wiring, and connectors can help prevent issues that may trigger this error code.

8. Can I reset the Check Engine Light after addressing OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

Yes, once the underlying issue has been repaired, the Check Engine Light can be reset using an OBDII scanner to clear the error code and turn off the light.

9. Is it safe to continue driving my Buick with the Check Engine Light illuminated due to OBDII code P16A2 related to the Throttle Position Sensor Communication Circuit Performance?

While the vehicle may still be operable, it is recommended to address the issue promptly to prevent further complications and potential damage to the engine.

10. How long does it typically take to repair OBDII code P16A2 in a Buick related to the Throttle Position Sensor Communication Circuit Performance?

The repair time can vary depending on the exact cause of the issue and the availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.