AutoCodes – Generic – P182C

P182C Code - Internal Mode Switch 'B' 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: P182C indicates Internal Mode Switch 'B' 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 3,788

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 P182C 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 greater than 2.38 V, for 1.75 s.

OBDII Code P182C - Internal Mode Switch 'B' Circuit High Voltage - AutoCodes.com — P182C Code - Internal Mode Switch 'B' Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P182C?

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 P182C?

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 P182C 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 P182C code?

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Information for Specific Makes

P182C Buick — Internal Mode Switch 'B' Circuit High Voltage
P182C Cadillac — Internal Mode Switch 'B' Circuit High Voltage
P182C Chevrolet — Internal Mode Switch 'B' Circuit High Voltage
P182C GMC — Internal Mode Switch 'B' 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 P182C Code

1. What are the common symptoms of OBDII code P182C - Internal Mode Switch 'B' Circuit High Voltage?

- Common symptoms include issues with shifting gears, erratic shifting behavior, and the inability to engage certain gears.

2. What are the possible causes of OBDII code P182C?

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

3. How serious is OBDII code P182C - Internal Mode Switch 'B' Circuit High Voltage?

- This code should be addressed promptly as it can lead to transmission performance issues, potentially causing further damage if left unresolved.

4. Can OBDII code P182C cause damage to other vehicle components?

- Yes, if not addressed in a timely manner, this code can potentially cause damage to the transmission or other related components.

5. How can I diagnose OBDII code P182C?

- Diagnosis typically involves using a scan tool to retrieve the code, testing the internal mode switch and related wiring, and performing a thorough inspection of the transmission system.

6. Is it safe to continue driving with OBDII code P182C present?

- It is not recommended to continue driving with this code active, as it can lead to transmission issues and potentially unsafe driving conditions.

7. Can I repair OBDII code P182C on my own?

- While some DIY enthusiasts may attempt to address this code, it is recommended to seek professional assistance due to the complexity of transmission-related repairs.

8. How much does it cost to repair OBDII code P182C?

- The cost of repairs can vary depending on the underlying cause, but it may involve replacing the internal mode switch, repairing damaged wiring, or reprogramming the transmission control module.

9. Are there any preventive maintenance tips to avoid OBDII code P182C?

- Regular transmission fluid changes, maintaining proper transmission fluid levels, and addressing any transmission issues promptly can help prevent this code from occurring.

10. Will resetting the OBDII code P182C turn off the check engine light?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.