AutoCodes – GMC – P182C GMC

P182C GMC 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 GMC 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 914

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

What does this mean?

What are the Possible Causes of the DTC P182C GMC?

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 GMC?

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 GMC 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 GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

P182C 2014 GMC Sierra — Internal Mode Switch 'B' Circuit High Voltage
P182C 2015 GMC Sierra — Internal Mode Switch 'B' Circuit High Voltage
P182C 2016 GMC Sierra — Internal Mode Switch 'B' Circuit High Voltage
P182C 2017 GMC Sierra — Internal Mode Switch 'B' Circuit High Voltage
P182C 2018 GMC Sierra — Internal Mode Switch 'B' Circuit High 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 P182C GMC Code

1. What are the common symptoms of OBDII code P182C GMC?

The common symptoms of code P182C GMC include issues with shifting gears, hesitation or jerking during acceleration, and the inability to shift out of a certain gear.

2. What causes the Internal Mode Switch 'B' Circuit High Voltage error code P182C GMC?

The P182C GMC code is typically caused by a malfunction in the internal mode switch 'B' circuit, which can be due to a faulty internal mode switch, damaged wiring, or a poor connection.

3. How can I diagnose the Internal Mode Switch 'B' Circuit High Voltage code P182C GMC?

Diagnosing code P182C GMC involves using a scan tool to check for the specific code, inspecting the internal mode switch and its wiring for any visible damage, and testing the switch for proper functionality.

4. Can I drive my vehicle with OBDII code P182C GMC?

It is not recommended to drive your vehicle with the P182C GMC code present, as it can lead to further damage to the transmission or drivability issues. It's best to address the issue promptly.

5. How do I repair OBDII code P182C GMC?

To repair code P182C GMC, you may need to replace the internal mode switch, repair any damaged wiring or connections, and clear the code using a scan tool. Professional help may be necessary for accurate diagnosis and repair.

6. Is the Internal Mode Switch 'B' Circuit High Voltage code P182C GMC a serious issue?

Yes, the P182C GMC code is a serious issue that can affect the performance and drivability of your vehicle. It's important to address the issue promptly to avoid further damage.

7. Can a DIY enthusiast fix OBDII code P182C GMC at home?

While some DIY enthusiasts may be able to diagnose and repair code P182C GMC at home, it is recommended to seek professional help, especially when dealing with transmission-related issues to ensure proper diagnosis and repair.

8. How long does it take to repair the Internal Mode Switch 'B' Circuit High Voltage code P182C GMC?

The repair time for code P182C GMC can vary depending on the exact cause of the issue and the extent of the repairs needed. It can take anywhere from a couple of hours to a full day to address the problem.

9. Will resetting the check engine light fix OBDII code P182C GMC?

Simply resetting the check engine light without addressing the underlying issue causing code P182C GMC will not fix the problem. It's important to diagnose and repair the root cause of the code to prevent it from reoccurring.

10. How much does it cost to fix OBDII code P182C GMC?

The cost of fixing code P182C GMC can vary depending on the cause of the issue, the parts needed for repair, and the labor costs. It's best to consult a professional mechanic for an accurate estimate.