AutoCodes – Chevrolet – P16A1 2017 Chevrolet Silverado

P16A1 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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 1,353

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 P16A1 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado - Throttle Position Sensor Communication Circuit High Voltage - AutoCodes.com — P16A1 2017 Chevrolet Silverado Code - Throttle Position Sensor Communication Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P16A1 2017 Chevrolet Silverado?

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 2017 Chevrolet Silverado?

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 2017 Chevrolet Silverado 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 P16A1 2017 Chevrolet Silverado 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 P16A1 2017 Chevrolet Silverado Code

1. What does the OBDII code P16A1 mean for a 2017 Chevrolet Silverado?

P16A1 indicates a high-voltage issue in the Throttle Position Sensor (TPS) communication circuit, which can affect throttle response and engine performance.

2. What are the common symptoms of code P16A1 in a Chevrolet Silverado?

Symptoms may include reduced engine power, poor throttle response, the check engine light turning on, and the vehicle entering "limp mode."

3. What causes the P16A1 code to appear?

Common causes include a faulty throttle position sensor, damaged wiring or connectors in the TPS circuit, or a malfunctioning engine control module (ECM).

4. Can a dirty throttle body cause a P16A1 code?

A dirty throttle body is unlikely to cause this specific code, but it can contribute to related throttle performance issues, so cleaning it may help in some cases.

5. How do I diagnose the P16A1 code on my Silverado?

Start by inspecting the wiring and connectors for damage or corrosion, testing the throttle position sensor with a multimeter, and checking for proper voltage in the circuit.

6. Is it safe to drive with the P16A1 code active?

Driving with this code is not recommended, as it can lead to reduced engine performance and the vehicle may enter limp mode, limiting speed and power.

7. How can I fix the P16A1 code on my 2017 Silverado?

Repairs may include replacing the throttle position sensor, repairing damaged wiring, or reprogramming or replacing the ECM if necessary.

8. How much does it cost to repair a P16A1 code?

Repair costs vary but may range from $100 to $300 for parts and labor, depending on whether the issue is with the TPS, wiring, or ECM.

9. Can a loose battery connection cause the P16A1 code?

A loose or weak battery connection can cause electrical issues that might trigger TPS-related codes, so itâ€™s worth checking the battery connections.

10. Do I need to reprogram the ECM after fixing the P16A1 code?

ECM reprogramming is usually not required unless the ECM itself is faulty or a software update is necessary to resolve the issue.