AutoCodes – GMC – P182D 2015 GMC Sierra

P182D 2015 GMC Sierra Code - Internal Mode Switch 'P' 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: P182D 2015 GMC Sierra indicates Internal Mode Switch 'P' 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 371

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 P182D 2015 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 P signal circuit voltage is greater than 2.38 V, for 1.75 s.

OBDII Code P182D 2015 GMC Sierra - Internal Mode Switch 'P' Circuit High Voltage - AutoCodes.com — P182D 2015 GMC Sierra Code - Internal Mode Switch 'P' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182D 2015 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 P182D 2015 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 P182D 2015 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 P182D 2015 GMC Sierra 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 P182D 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P182D in a 2015 GMC Sierra?

- Common symptoms may include issues with shifting gears, the transmission not engaging properly, and the Check Engine Light being illuminated.

2. What does the OBDII code P182D 'Internal Mode Switch P Circuit High Voltage' mean for a 2015 GMC Sierra?

- This code indicates that there is a high voltage condition detected in the internal mode switch 'P' circuit of the vehicle's transmission.

3. What are the possible causes of OBDII code P182D in a 2015 GMC Sierra?

- Possible causes may include a faulty internal mode switch, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose the OBDII code P182D in my 2015 GMC Sierra?

- Diagnosing this code typically involves using a scan tool to retrieve the trouble codes, checking the internal mode switch for proper operation, inspecting the wiring and connectors for any damage, and testing the transmission fluid levels.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P182D present?

- 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. How can I repair OBDII code P182D in my 2015 GMC Sierra?

- Repairing this code may involve replacing the internal mode switch, repairing any damaged wiring or connectors, ensuring proper transmission fluid levels, and resetting the trouble codes with a scan tool.

7. Is it possible to reset the OBDII code P182D in a 2015 GMC Sierra without making any repairs?

- While you can clear the trouble codes with a scan tool, it is important to address the underlying issue causing the code to prevent further problems with the transmission.

8. How much does it typically cost to fix OBDII code P182D in a 2015 GMC Sierra?

- The cost of fixing this code can vary depending on the specific cause, but it may involve parts and labor expenses ranging from $200 to $500 or more, depending on the extent of the repairs needed.

9. Are there any preventive maintenance steps to avoid OBDII code P182D in a 2015 GMC Sierra?

- Regularly checking and maintaining the transmission fluid levels, addressing any transmission issues promptly, and ensuring proper functioning of the internal mode switch can help prevent this code from appearing.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P182D in a 2015 GMC Sierra?

- While some basic troubleshooting steps can be performed by a knowledgeable DIY enthusiast, diagnosing and repairing this code may require specialized tools and expertise, so it is advisable to consult a professional mechanic for accurate diagnosis and repair.