AutoCodes – GMC – P182D 2016 GMC Sierra

P182D 2016 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 2016 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 178

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

OBDII Code P182D 2016 GMC Sierra - Internal Mode Switch 'P' Circuit High Voltage - AutoCodes.com — P182D 2016 GMC Sierra Code - Internal Mode Switch 'P' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182D 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 P182D 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 P182D 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 P182D 2016 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P182D in a 2016 GMC Sierra?

The common symptoms of OBDII code P182D (Internal Mode Switch 'P' Circuit High Voltage) in a 2016 GMC Sierra may include issues with gear shifting, transmission performance issues, and the Check Engine light illuminated on the dashboard.

2. What are the possible causes of OBDII code P182D in a 2016 GMC Sierra?

Possible causes of OBDII code P182D in a 2016 GMC Sierra include a faulty internal mode switch, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module.

3. How can I diagnose OBDII code P182D in my 2016 GMC Sierra?

Diagnosing OBDII code P182D in a 2016 GMC Sierra typically involves using a diagnostic scanner to retrieve the trouble codes, inspecting the internal mode switch and its circuit for any visible damage, and testing the transmission control module for proper functioning.

4. Can I continue driving my 2016 GMC Sierra with OBDII code P182D?

It is not recommended to continue driving your 2016 GMC Sierra with OBDII code P182D, as this issue can affect the performance and reliability of your vehicle's transmission. It is advisable to address the problem promptly to prevent further damage.

5. How can OBDII code P182D in a 2016 GMC Sierra be repaired?

Repairing OBDII code P182D in a 2016 GMC Sierra often involves replacing the internal mode switch, repairing any damaged wiring or connectors in the circuit, or reprogramming the transmission control module. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Is OBDII code P182D a serious issue in a 2016 GMC Sierra?

OBDII code P182D (Internal Mode Switch 'P' Circuit High Voltage) in a 2016 GMC Sierra should be addressed promptly to prevent potential transmission problems and ensure the overall health of the vehicle. Ignoring this issue can lead to further complications and costly repairs.

7. Can a DIY enthusiast fix OBDII code P182D in a 2016 GMC Sierra?

While some aspects of diagnosing and repairing OBDII code P182D in a 2016 GMC Sierra can be done by a DIY enthusiast, it is recommended to seek assistance from a professional mechanic for accurate diagnosis and proper repair to ensure the issue is resolved effectively.

8. How much does it typically cost to repair OBDII code P182D in a 2016 GMC Sierra?

The cost of repairing OBDII code P182D in a 2016 GMC Sierra can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any parts that need replacement. It is advisable to obtain quotes from multiple mechanics for an accurate estimate.

9. Will resetting the Check Engine light resolve OBDII code P182D in a 2016 GMC Sierra?

Simply resetting the Check Engine light will not resolve OBDII code P182D in a 2016 GMC Sierra. The underlying issue causing the code needs to be diagnosed and repaired to ensure the problem is fixed and the Check Engine light does not come back on.

10. How can I prevent OBDII code P182D from recurring in my 2016 GMC Sierra?

To prevent OBDII code P182D from recurring in your 2016 GMC Sierra, it is essential to perform regular maintenance on your vehicle, address any transmission-related issues promptly, and ensure the internal mode switch and its circuit are in good condition. Regularly servicing your vehicle can help prevent such issues from arising.