AutoCodes – Chevrolet – P16F4 Chevrolet

P16F4 Chevrolet Code - Control Module Transmission Range Switch Input Circuitry Performance

Quick Answer

The automatic transmission manual shift shaft position switch assembly, also called the internal mode switch assembly, contains two sliding hall-effect switch assemblies attached to the control valve body within the transmission. Common causes include Faulty Control Module Transmission Range Switch, Control Module Transmission Range Switch harness is open or shorted, Control Module Transmission Range Switch 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: P16F4 Chevrolet indicates Control Module Transmission Range Switch Input Circuitry Performance.
Common causes: Common causes include Faulty Control Module Transmission Range Switch, Control Module Transmission Range Switch harness is open or shorted, Control Module Transmission Range Switch 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 1,330

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 Jan 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16F4 Chevrolet Description

The automatic transmission manual shift shaft position switch assembly, also called the internal mode switch assembly, contains two sliding hall-effect switch assemblies attached to the control valve body within the transmission. The 9 outputs from the switches indicate which position is selected by the transmission manual shaft. Four outputs (A, B, C, P) are range selection inputs to the transmission control module (TCM). Five outputs (R1, R2, D1, D2, S) are direction selection inputs to the hybrid powertrain control module. The Range input signals are represented as TCM scan tool parameters, Internal Mode Switch A, B, C, and P. The Direction input signals are represented as hybrid powertrain control module scan tool parameters, Internal Mode Switch 2 - R1, R2, D1, D2, and S. The input voltage at the modules is high when a switch is open and low when a switch is closed to earth. Each control module independently supplies power and earth to its respective switch assembly.
The hybrid powertrain control module is internal to the power inverter module, often referred to as the drive motor generator power inverter module and is not serviced separately. The hybrid powertrain control module compares the internal mode switch requested direction to other data to verify that the indicated direction and range switch calculation is correct.

OBDII Code P16F4 Chevrolet - Control Module Transmission Range Switch Input Circuitry Performance - AutoCodes.com — P16F4 Chevrolet Code - Control Module Transmission Range Switch Input Circuitry Performance

What does this mean?

What are the Possible Causes of the DTC P16F4 Chevrolet?

Faulty Control Module Transmission Range Switch
Control Module Transmission Range Switch harness is open or shorted
Control Module Transmission Range Switch circuit poor electrical connection

How to Fix the DTC P16F4 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16F4 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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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 P16F4 Chevrolet Code

1. What are the common symptoms of OBDII code P16F4 in a Chevrolet related to the Control Module Transmission Range Switch Input Circuitry Performance?

- Common symptoms may include issues with shifting gears, erratic transmission behavior, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P16F4 in a Chevrolet?

- Possible causes can include a faulty transmission range switch, damaged wiring or connectors in the circuit, or issues with the control module itself.

3. How can I diagnose the OBDII code P16F4 in a Chevrolet?

- Diagnosing this code typically involves using a scan tool to retrieve the specific trouble code, checking the transmission range switch and its circuitry for faults, and testing the control module.

4. What repair tips can help fix OBDII code P16F4 in a Chevrolet?

- Repair tips may include repairing or replacing damaged wiring, connectors, or the transmission range switch, as well as reprogramming the control module if necessary.

5. Is it safe to continue driving with OBDII code P16F4 in a Chevrolet?

- It is not recommended to continue driving with this code present, as it can lead to potential transmission issues and further damage if left unresolved.

6. Can resetting the OBDII system clear the P16F4 code in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear.

7. How much does it typically cost to repair OBDII code P16F4 in a Chevrolet?

- The cost of repairing this code can vary depending on the specific cause, but it may involve anywhere from simple repairs to more extensive replacements, potentially costing a few hundred dollars to over a thousand.

8. Are there any recalls or technical service bulletins related to OBDII code P16F4 in Chevrolet vehicles?

- It's recommended to check with Chevrolet dealerships or online resources for any relevant recalls or technical service bulletins related to this specific OBDII code in Chevrolet vehicles.

9. Can a DIY enthusiast fix OBDII code P16F4 in a Chevrolet, or is it best left to professionals?

- Depending on the level of expertise and access to tools, some DIY enthusiasts may be able to diagnose and repair this code themselves. However, if unsure, it's best to consult with a professional mechanic.

10. How often does OBDII code P16F4 occur in Chevrolet vehicles, and is it a common issue?

- While the frequency of this specific code may vary, issues related to the transmission range switch input circuitry performance can occur in Chevrolet vehicles and should be addressed promptly to avoid further complications.