AutoCodes – Buick – P16A0 Buick

P16A0 Buick Code - Throttle Position Sensor Communication Circuit Low 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: P16A0 Buick indicates Throttle Position Sensor Communication Circuit Low 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 867

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 P16A0 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 a low voltage circuit condition on the throttle position sensor signal circuit for greater than 1 s.

OBDII Code P16A0 Buick - Throttle Position Sensor Communication Circuit Low Voltage - AutoCodes.com — P16A0 Buick Code - Throttle Position Sensor Communication Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P16A0 Buick?

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 P16A0 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 P16A0 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.

Need more information about the P16A0 Buick code?

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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 P16A0 Buick Code

1. What are common symptoms of OBDII code P16A0 in a Buick related to the throttle position sensor communication circuit low voltage?

The common symptoms include poor acceleration, engine stalling, rough idling, and a noticeable decrease in fuel efficiency.

2. What are the potential causes of the OBDII code P16A0 indicating a low voltage issue with the throttle position sensor in a Buick?

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

3. How can I diagnose the throttle position sensor communication circuit low voltage issue in my Buick triggering the P16A0 code?

You can use a multimeter to check the voltage output of the throttle position sensor, inspect the wiring and connectors for any damage, and perform a thorough visual inspection of the sensor and its connections.

4. Is it safe to continue driving my Buick with the OBDII code P16A0 related to the throttle position sensor communication circuit low voltage?

It is not recommended to drive the vehicle with this issue as it can lead to further damage to the engine or other components. It is best to address the problem promptly.

5. How can I reset the OBDII code P16A0 in my Buick after repairing the throttle position sensor communication circuit low voltage issue?

You can reset the code using an OBDII scanner or by disconnecting the battery for a few minutes. Ensure that the underlying issue has been resolved before clearing the code.

6. Can a DIY enthusiast repair the throttle position sensor communication circuit low voltage issue related to the P16A0 code in a Buick?

While some simple diagnostic and repair tasks can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a thorough diagnosis and proper repair of this issue.

7. Will a faulty throttle position sensor always trigger the OBDII code P16A0 in a Buick?

Not necessarily. The code can also be triggered by issues with the communication circuit or the engine control module. Proper diagnosis is essential to pinpoint the exact cause.

8. How much does it typically cost to repair the throttle position sensor communication circuit low voltage issue causing the P16A0 code in a Buick?

The cost of repair can vary depending on the exact cause of the issue, the labor rates in your area, and whether any parts need to be replaced. It is recommended to get a few quotes from different mechanics.

9. Are there any preventative measures to avoid the recurrence of the OBDII code P16A0 related to the throttle position sensor in a Buick?

Regular maintenance checks, inspecting the wiring harness for any signs of wear, and promptly addressing any engine performance issues can help prevent the recurrence of this code.

10. Can a low battery voltage or alternator issue cause the OBDII code P16A0 related to the throttle position sensor communication circuit low voltage in a Buick?

Yes, low battery voltage or alternator problems can affect the electrical systems in the vehicle, including the throttle position sensor circuit. It is recommended to ensure the battery and charging system are in good condition.