AutoCodes – GMC – P182B 2017 GMC Sierra

P182B 2017 GMC Sierra Code - Internal Mode Switch 'B' Circuit Low 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: P182B 2017 GMC Sierra indicates Internal Mode Switch 'B' Circuit Low 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 252

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 P182B 2017 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 less than 0.7 V, for 1.75 s.

OBDII Code P182B 2017 GMC Sierra - Internal Mode Switch 'B' Circuit Low Voltage - AutoCodes.com — P182B 2017 GMC Sierra Code - Internal Mode Switch 'B' Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P182B 2017 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 P182B 2017 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 P182B 2017 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 P182B 2017 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 P182B 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P182B in a 2017 GMC Sierra?

Common symptoms include difficulty shifting gears, erratic shifting behavior, and the vehicle may go into a limp mode.

2. What does the OBDII code P182B 'Internal Mode Switch B Circuit Low Voltage' indicate in a 2017 GMC Sierra?

This code indicates a problem with the internal mode switch 'B' circuit in the transmission control module.

3. What are the possible causes of OBDII code P182B in a 2017 GMC Sierra?

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

4. How can I diagnose the Internal Mode Switch 'B' Circuit Low Voltage issue in a 2017 GMC Sierra?

Diagnosis typically involves using a scan tool to retrieve the trouble codes, inspecting the wiring and connectors for damage, and testing the internal mode switch for proper operation.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P182B?

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

6. How can I repair OBDII code P182B in my 2017 GMC Sierra?

Repair options may include replacing the internal mode switch, repairing or replacing damaged wiring or connectors, checking and topping up transmission fluid, or reprogramming the transmission control module.

7. Is it necessary to reset the trouble codes after repairing OBDII code P182B in a 2017 GMC Sierra?

Yes, it is important to clear the trouble codes using a scan tool after performing the necessary repairs to reset the system and ensure the issue has been resolved.

8. Can a DIY enthusiast fix OBDII code P182B in a 2017 GMC Sierra?

While some basic troubleshooting steps can be done by a DIY enthusiast, diagnosing and repairing this code may require specialized tools and expertise, so it is recommended to consult a professional mechanic.

9. Will OBDII code P182B cause permanent damage to the transmission in a 2017 GMC Sierra?

Continued driving with this code can potentially cause damage to the transmission components, so it is best to address the issue promptly to prevent further damage.

10. How much can I expect to pay for repairs related to OBDII code P182B in a 2017 GMC Sierra?

The cost of repairs can vary depending on the exact cause of the issue, but it is advisable to budget for diagnostic fees, parts replacement, and labor costs which can range from a few hundred to over a thousand dollars.