AutoCodesGMC – P182F 2015 GMC Sierra

P182F 2015 GMC Sierra Code - Internal Mode Switch 'C' 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
P182F 2015 GMC Sierra indicates Internal Mode Switch 'C' 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 161
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 23, 2024
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Code P182F 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 C signal circuit voltage is greater than 2.38 V, for 1.75 s.
OBDII Code P182F 2015 GMC Sierra - Internal Mode Switch 'C' Circuit High Voltage - AutoCodes.com
P182F 2015 GMC Sierra Code - Internal Mode Switch 'C' Circuit High Voltage

What are the Possible Causes of the DTC P182F 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 P182F 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 P182F 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 P182F 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 P182F 2015 GMC Sierra Code

1. What does the OBDII code P182F mean on a 2015 GMC Sierra?

The code P182F indicates a high voltage issue in the Internal Mode Switch 'C' circuit, which is part of the transmission range sensor system.

2. What are common symptoms of code P182F on a GMC Sierra?

Symptoms may include the transmission not shifting properly, the vehicle stuck in a specific gear, illuminated check engine light, or erratic gear indicator behavior.

3. What causes the P182F code to appear?

Common causes include a faulty internal mode switch, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module (TCM).

4. Can I drive my 2015 GMC Sierra with the P182F code?

Driving with this code is not recommended, as it could lead to transmission damage or unsafe driving conditions due to improper gear operation.

5. How is the P182F code diagnosed?

A technician will inspect the wiring and connectors, test the internal mode switch, and use a scan tool to check TCM data for irregularities in the transmission range sensor system.

6. What repairs are needed for the P182F code?

Repairs may include replacing the internal mode switch, fixing or replacing damaged wiring, or reprogramming or replacing the transmission control module if needed.

7. How much does it cost to fix the P182F code on a GMC Sierra?

Repair costs can vary but typically range from $200 to $600, depending on whether the issue is wiring-related or requires replacing the internal mode switch.

8. Can a dead battery cause the P182F code?

While unlikely, a severely low or dead battery can impact transmission electronics, so the battery and charging system should be inspected if no other faults are found.

9. Will clearing the P182F code with a scan tool fix the problem?

Clearing the code will turn off the check engine light temporarily but will not resolve the underlying issue causing the code.

10. Is the P182F code a common issue in the 2015 GMC Sierra?

While not extremely common, it can occur due to wear and tear on the internal mode switch or wiring issues, especially in high-mileage vehicles.

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