AutoCodes – Generic – P182F

P182F 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 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 5,829

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 P182F 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 - Internal Mode Switch 'C' Circuit High Voltage - AutoCodes.com — P182F Code - Internal Mode Switch 'C' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182F?

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?

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 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 code?

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Need Help with the Code?

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Information for Specific Makes

P182F Buick — Internal Mode Switch 'C' Circuit High Voltage
P182F Cadillac — Internal Mode Switch 'C' Circuit High Voltage
P182F Chevrolet — Internal Mode Switch 'C' Circuit High Voltage
P182F GMC — Internal Mode Switch 'C' Circuit High Voltage

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 Code

1. What are the common symptoms of OBDII code P182F (Internal Mode Switch 'C' Circuit High Voltage)?

The common symptoms include issues with shifting gears, the transmission staying in one gear, or the vehicle not starting.

2. What are the possible causes of OBDII code P182F?

Possible causes include a faulty internal mode switch, damaged wiring or connectors in the internal mode switch circuit, or a problem with the transmission control module.

3. How can I diagnose the Internal Mode Switch 'C' Circuit High Voltage issue?

Diagnosis typically involves using a scan tool to retrieve the specific trouble code, checking the internal mode switch for proper operation, and inspecting the wiring and connectors for any visible damage.

4. Can OBDII code P182F cause damage to the vehicle if left unrepaired?

Continued driving with this issue can potentially lead to further damage to the transmission or other related components, so it is recommended to address the problem promptly.

5. How can I repair OBDII code P182F at home?

If you have the necessary tools and expertise, you can try replacing the internal mode switch, repairing any damaged wiring or connectors, or resetting the transmission control module to see if that resolves the issue.

6. Is it safe to drive with OBDII code P182F illuminated on the dashboard?

It is not recommended to drive the vehicle with this issue, as it can affect the transmission's performance and potentially lead to further problems down the line.

7. How much does it typically cost to repair OBDII code P182F at a professional repair shop?

The cost of repairs can vary depending on the specific cause of the issue, but it may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P182F?

Depending on the root cause of the problem, a DIY enthusiast with basic automotive knowledge may be able to troubleshoot and repair the issue themselves, but more complex repairs may require professional assistance.

9. Will resetting the OBDII code P182F make it go away permanently?

Simply resetting the trouble code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the problem resurfaces.

10. How long does it typically take to repair OBDII code P182F?

The repair time can vary based on the specific cause of the issue and the complexity of the repair, but it may take anywhere from a few hours to a full day at a repair shop.