AutoCodesGMC – P182F 2017 GMC Sierra

P182F 2017 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 2017 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 158
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 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 C signal circuit voltage is greater than 2.38 V, for 1.75 s.
OBDII Code P182F 2017 GMC Sierra - Internal Mode Switch 'C' Circuit High Voltage - AutoCodes.com
P182F 2017 GMC Sierra Code - Internal Mode Switch 'C' Circuit High Voltage

What are the Possible Causes of the DTC P182F 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 P182F 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 P182F 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 P182F 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 P182F 2017 GMC Sierra Code

1. What does the OBDII code P182F mean on a 2017 GMC Sierra?

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

2. What are the common symptoms of the P182F code in a 2017 GMC Sierra?

Symptoms may include a check engine light, erratic shifting, failure to shift properly, or the vehicle being stuck in a specific gear.

3. What causes the P182F code to appear?

Common causes include damaged wiring or connectors in the IMS circuit, a faulty Internal Mode Switch, or issues with the transmission control module (TCM).

4. Can I still drive my 2017 GMC Sierra with the P182F code?

Driving may be possible but is not recommended, as the code can affect transmission performance and potentially cause further damage.

5. How is the P182F code diagnosed?

A technician will use a scan tool to check for related codes, inspect the IMS circuit wiring and connectors, and test the Internal Mode Switch and TCM for proper function.

6. How do I repair the P182F code on a 2017 GMC Sierra?

Repairs may involve replacing damaged wiring, repairing connectors, or replacing the Internal Mode Switch or TCM if found faulty.

7. Is the P182F code covered under warranty for a 2017 GMC Sierra?

It depends on the vehicle's warranty status and coverage details. Check with your dealership or warranty provider for specifics.

8. How much does it cost to fix the P182F code on a 2017 GMC Sierra?

Repair costs vary depending on the issue, but replacing an Internal Mode Switch can range from $150 to $500, including parts and labor.

9. Can a bad battery cause the P182F code in a 2017 GMC Sierra?

While unlikely, a weak or faulty battery can sometimes cause voltage-related issues that might trigger transmission-related codes.

10. How can I prevent the P182F code from occurring again?

Regular maintenance, inspecting wiring for damage, and addressing transmission issues promptly can help prevent this code from reoccurring.

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