AutoCodes – Chevrolet – P16A0 Chevrolet

P16A0 Chevrolet 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 Chevrolet 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 12,048

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
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P16A0 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 low voltage circuit condition on the throttle position sensor signal circuit for greater than 1 s.

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

What does this mean?

What are the Possible Causes of the DTC P16A0 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 P16A0 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 P16A0 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.

Need more information about the P16A0 Chevrolet code?

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Information for Specific Chevrolet Models

P16A0 2014 Chevrolet Silverado — Throttle Position Sensor Communication Circuit Low Voltage
P16A0 2015 Chevrolet Silverado — Throttle Position Sensor Communication Circuit Low Voltage
P16A0 2016 Chevrolet Silverado — Throttle Position Sensor Communication Circuit Low Voltage
P16A0 2017 Chevrolet Silverado — Throttle Position Sensor Communication Circuit Low Voltage
P16A0 2018 Chevrolet Silverado — Throttle Position Sensor Communication Circuit Low 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 P16A0 Chevrolet Code

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

- Common symptoms include rough idling, poor acceleration, stalling, and decreased fuel efficiency.

2. What are the possible causes of OBDII code P16A0 on a Chevrolet indicating a low voltage issue in the throttle position sensor communication circuit?

- The code may be triggered by a faulty throttle position sensor, damaged wiring, poor electrical connections, or a defective Engine Control Module (ECM).

3. How can I diagnose the throttle position sensor communication circuit low voltage issue causing OBDII code P16A0 on my Chevrolet?

- Use a multimeter to test the throttle position sensor's voltage output, inspect the wiring for damage, and check the ECM connections for any corrosion or looseness.

4. Can a dirty throttle body or air filter cause OBDII code P16A0 to appear on a Chevrolet?

- While a dirty throttle body or air filter can contribute to poor engine performance, they are not direct causes of the throttle position sensor communication circuit low voltage issue indicated by code P16A0.

5. What steps should I take to repair OBDII code P16A0 on my Chevrolet related to the throttle position sensor communication circuit low voltage?

- Start by replacing the throttle position sensor if it is faulty, repair any damaged wiring, ensure all electrical connections are secure, and consider reprogramming or replacing the ECM if necessary.

6. Is it safe to continue driving my Chevrolet with OBDII code P16A0 indicating a throttle position sensor communication circuit low voltage issue?

- It is not recommended to continue driving with this code present, as it can lead to further engine performance issues and potential safety hazards. Prompt diagnosis and repair are advised.

7. Can resetting the OBDII code P16A0 on my Chevrolet make the issue go away temporarily?

- Resetting the code may temporarily clear the check engine light, but the underlying issue causing the throttle position sensor communication circuit low voltage will persist until properly diagnosed and repaired.

8. How much does it typically cost to repair OBDII code P16A0 on a Chevrolet at a professional mechanic or dealership?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for parts and labor, with dealership rates likely on the higher end.

9. Are there any preventive maintenance measures I can take to avoid OBDII code P16A0 related to the throttle position sensor on my Chevrolet?

- Regularly inspect and clean the throttle body, replace air filters as recommended, and address any engine performance issues promptly to help prevent issues with the throttle position sensor communication circuit.

10. If I have already replaced the throttle position sensor and the issue persists, what else should I consider checking to resolve OBDII code P16A0 on my Chevrolet?

- In such cases, consider checking the wiring harness for additional damage, verifying the integrity of the ECM connections, and consulting with a professional mechanic for further diagnostic assistance.