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Engine-Codes – GMC – P182C 2016 GMC Sierra

P182C 2016 GMC Sierra Code - Internal Mode Switch 'B' Circuit High Voltage

Quick Answer

The P182C diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Internal Mode Switch 'B' Circuit High Voltage. Common causes include Faulty internal mode switch, Damaged wiring or connectors in the circuit, Malfunctioning TCM. 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
P182C 2016 GMC Sierra indicates Internal Mode Switch 'B' Circuit High Voltage.
Common causes
Common causes include Faulty internal mode switch, Damaged wiring or connectors in the circuit, Malfunctioning TCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P182C 2016 GMC Sierra Description

The P182C diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Internal Mode Switch 'B' Circuit High Voltage. The internal mode switch is a critical component of the transmission system that helps the vehicle's computer determine the current gear selection. When the internal mode switch 'B' circuit registers a high voltage, it indicates a problem with the signal being sent to the transmission control module (TCM). This can lead to incorrect gear selection, erratic shifting, and overall poor performance of the transmission system.

OBDII Code P182C 2016 GMC Sierra - Internal Mode Switch 'B' Circuit High Voltage
P182C 2016 GMC Sierra Code - Internal Mode Switch 'B' Circuit High Voltage

Common Causes of P182C 2016 GMC Sierra

  1. Faulty internal mode switch
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning TCM
  4. Corrosion or water damage in the transmission system
  5. Electrical issues such as a short circuit or open circuit in the circuit

Symptoms of P182C 2016 GMC Sierra

  1. Harsh or erratic shifting
  2. Delayed engagement when shifting gears
  3. Incorrect gear selection displayed on the instrument panel
  4. Limp mode activation
  5. Check engine light illuminated

How to Fix P182C 2016 GMC Sierra

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific DTC and confirm the issue.
  2. Inspect the internal mode switch 'B' circuit for any visible damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  3. Test the internal mode switch using a multimeter to ensure it is functioning correctly. Replace the switch if it fails the test.
  4. Check the wiring harness and connectors for any signs of wear or damage. Repair or replace any faulty wiring or connectors.
  5. Clear the DTC from the vehicle's computer memory using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P182C 2016 GMC Sierra

The typical repair costs for addressing the Internal Mode Switch 'B' Circuit High Voltage issue can vary depending on the specific cause of the problem and the extent of the repairs needed. In general, the cost of parts for this repair could range from $100 to $300, while labor costs could range from $150 to $400. Overall, the total cost of the repair could fall between $250 and $700, including parts and labor.

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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 P182C 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P182C in a 2016 GMC Sierra?

The common symptoms include issues with shifting gears, the transmission may not shift smoothly, and the vehicle may go into limp mode.

2. What can cause the Internal Mode Switch 'B' Circuit High Voltage error code in a 2016 GMC Sierra?

Potential causes of this code include a faulty internal mode switch, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose the Internal Mode Switch 'B' Circuit High Voltage error code in my 2016 GMC Sierra?

Diagnosis typically involves inspecting the internal mode switch, checking for damaged wiring, and using a scan tool to read the trouble codes stored in the transmission control module.

4. Can I drive my 2016 GMC Sierra with the P182C code?

It is not recommended to drive the vehicle with this code present, as it can lead to further transmission issues and potential safety hazards.

5. How much does it cost to repair the Internal Mode Switch 'B' Circuit High Voltage code in a 2016 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

6. Is it possible to reset the OBDII code P182C in a 2016 GMC Sierra?

Resetting the code may temporarily clear the error, but it is important to diagnose and fix the underlying issue to prevent the code from reappearing.

7. Can a DIY enthusiast repair the Internal Mode Switch 'B' Circuit High Voltage issue in a 2016 GMC Sierra?

While some individuals with mechanical knowledge may be able to address simpler causes like damaged wiring, complex transmission or module-related issues are best left to professional technicians.

8. What are the implications of ignoring the P182C code in a 2016 GMC Sierra?

Ignoring the code can lead to more severe transmission problems, potential safety risks, and increased repair costs in the long run.

9. How long does it take to repair the Internal Mode Switch 'B' Circuit High Voltage issue in a 2016 GMC Sierra?

The repair time can vary based on the specific cause of the problem, but it may take a few hours to a full day to complete the necessary repairs.

10. Will replacing the internal mode switch resolve the P182C code in a 2016 GMC Sierra?

Replacing the internal mode switch may fix the issue if it is the root cause; however, it is essential to verify through proper diagnosis before proceeding with any repairs.

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