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P182B 2017 GMC Sierra Code - Internal Mode Switch 'B' Circuit Low Voltage

Quick Answer

The P182B diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Internal Mode Switch 'B' Circuit Low Voltage. Common causes include Faulty internal mode switch, Wiring harness issues, Malfunctioning TCM. 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 internal mode switch, Wiring harness issues, Malfunctioning TCM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P182B 2017 GMC Sierra Description

The P182B diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Internal Mode Switch 'B' Circuit Low Voltage. This code is specifically related to the transmission control module (TCM) and the internal mode switch, which is responsible for determining the gear selection in automatic transmissions. The internal mode switch 'B' circuit is designed to provide feedback to the TCM regarding the gear position selected by the driver. When the voltage in this circuit drops below the specified threshold, the P182B code is triggered.

OBDII Code P182B 2017 GMC Sierra - Internal Mode Switch 'B' Circuit Low Voltage
P182B 2017 GMC Sierra Code - Internal Mode Switch 'B' Circuit Low Voltage

Common Causes of P182B 2017 GMC Sierra

  1. Faulty internal mode switch
  2. Wiring harness issues
  3. Malfunctioning TCM
  4. Poor electrical connection
  5. Corrosion or damage to electrical components

Symptoms of P182B 2017 GMC Sierra

  1. Erratic shifting or difficulty shifting gears
  2. Transmission slipping
  3. Harsh or delayed gear engagement
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix P182B 2017 GMC Sierra

  1. Perform a thorough inspection of the internal mode switch circuit and wiring harness for any signs of damage or corrosion.
  2. Test the internal mode switch for proper functionality using a multimeter.
  3. Check the TCM for any fault codes and ensure it is operating correctly.
  4. Repair or replace any damaged wiring or connectors in the internal mode switch circuit.
  5. Clear the DTC and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P182B 2017 GMC Sierra

The typical repair costs for addressing the P182B code on a 2017 GMC Sierra can range from $200 to $500, depending on the exact cause of the issue and the cost of parts and labor. It's important to note that specific diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops often charge less for repairs.

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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.

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