AutoCodes – GMC – P182C 2016 GMC Sierra

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

Quick Answer

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode 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: P182C 2016 GMC Sierra indicates Internal Mode Switch 'B' Circuit High Voltage.
Common causes: Common causes include Faulty Transmission Internal Mode Switch, Transmission Internal Mode Switch harness is open or shorted, Transmission Internal Mode 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 162

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 Mar 23, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P182C 2016 GMC Sierra Description

The internal mode switch indicates the Transmission Control Module (TCM) which gear position the vehicle operator has selected. The internal mode switch consists of 5 separate hall effect switches. Each hall effect switch is supplied with a 9 V reference circuit and a signal circuit from the TCM. Each signal circuit for each gear selector position will have either a voltage reading of 0.70–0.96 V indicating On or 1.68–2.38 V indicating Off. The voltage values on each internal mode switch circuit will change and are dependent on the position of the gear selector. The state of each internal mode switch A/B/C/P/S signal circuit is displayed on the scan tool. The Diagnostic Trouble Code (DTC) will be set when the TCM has detected the internal mode switch B signal circuit voltage is greater than 2.38 V, for 1.75 s.

OBDII Code P182C 2016 GMC Sierra - Internal Mode Switch 'B' Circuit High Voltage - AutoCodes.com — P182C 2016 GMC Sierra Code - Internal Mode Switch 'B' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182C 2016 GMC Sierra?

Faulty Transmission Internal Mode Switch
Transmission Internal Mode Switch harness is open or shorted
Transmission Internal Mode Switch circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC P182C 2016 GMC Sierra?

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 P182C 2016 GMC Sierra 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 P182C 2016 GMC Sierra code?

Need more information on how to fix the P182C 2016 GMC Sierra code? Get Access to Factory Service Manuals

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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.