AutoCodes – Buick – P182C Buick

P182C Buick 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 Buick 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 1,136

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

What does this mean?

What are the Possible Causes of the DTC P182C Buick?

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 Buick?

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 Buick 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.

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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 P182C Buick Code

1. What does the OBDII code P182C mean on a Buick?

P182C indicates a high voltage issue in the Internal Mode Switch 'B' Circuit, which is part of the transmission range sensor system responsible for monitoring gear selection.

2. What are the symptoms of the P182C code in a Buick?

Common symptoms include the transmission not shifting properly, the vehicle being stuck in a single gear, illuminated check engine light, or erratic gear selection.

3. What causes the P182C code to appear on a Buick?

The primary causes include a faulty internal mode switch, damaged wiring or connectors in the circuit, a short to voltage, or a malfunctioning transmission control module (TCM).

4. How do I diagnose a P182C code on my Buick?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to test for continuity and voltage in the Internal Mode Switch 'B' Circuit. If no issues are found, test the internal mode switch and TCM.

5. Can I drive my Buick with the P182C code?

It's not recommended to drive with this code active, as it can cause transmission problems that may lead to unsafe driving conditions or further damage to the vehicle.

6. How do you fix the P182C code on a Buick?

Repairs may include replacing the internal mode switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the TCM if necessary.

7. How much does it cost to fix the P182C code on a Buick?

The cost varies depending on the root cause. Replacing the internal mode switch typically costs $200â€“$400, while repairing wiring or replacing the TCM can increase costs.

8. Can a low battery cause the P182C code on a Buick?

While unlikely, a low or failing battery can sometimes cause electrical issues that trigger false codes. Ensure the battery and charging system are functioning correctly during diagnosis.

9. Is the P182C code specific to Buick vehicles?

No, the P182C code can appear in other GM vehicles with similar transmission systems, but the exact repair steps may vary by model and make.

10. Do I need to reset the code after fixing the P182C issue on my Buick?

Yes, after completing the repair, use an OBDII scanner to clear the code. Drive the vehicle to ensure the issue is resolved and the code does not return.