AutoCodes – Buick – P184B Buick

P184B Buick Code - Internal Mode Switch 2 S Circuit High Voltage

Quick Answer

The automatic transmission manual shift shaft position switch assembly, also called the internal mode switch assembly, contains two sliding hall-effect switch assemblies attached to the control valve body within the transmission. Common causes include Faulty Manual Shift Shaft Position Switch Assembly, Manual Shift Shaft Position Switch Assembly harness is open or shorted, Manual Shift Shaft Position Switch Assembly 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: P184B Buick indicates Internal Mode Switch 2 S Circuit High Voltage.
Common causes: Common causes include Faulty Manual Shift Shaft Position Switch Assembly, Manual Shift Shaft Position Switch Assembly harness is open or shorted, Manual Shift Shaft Position Switch Assembly 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,021

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 Jan 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P184B Buick Description

The automatic transmission manual shift shaft position switch assembly, also called the internal mode switch assembly, contains two sliding hall-effect switch assemblies attached to the control valve body within the transmission. The 9 outputs from the switches indicate which position is selected by the transmission manual shaft. Four outputs (A, B, C, P) are range selection inputs to the transmission control module (TCM). Five outputs (R1, R2, D1, D2, S) are direction selection inputs to the hybrid powertrain control module. The Range input signals are represented as TCM scan tool parameters, Internal Mode Switch A, B, C, and P. The Direction input signals are represented as hybrid powertrain control module scan tool parameters, Internal Mode Switch 2 - R1, R2, D1, D2, and S. The input voltage at the modules is high when a switch is open and low when a switch is closed to earth. Each control module independently supplies power and earth to its respective switch assembly.
The hybrid powertrain control module is internal to the power inverter module, often referred to as the drive motor generator power inverter module and is not serviced separately.

OBDII Code P184B Buick - Internal Mode Switch 2 S Circuit High Voltage - AutoCodes.com — P184B Buick Code - Internal Mode Switch 2 S Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P184B Buick?

Faulty Manual Shift Shaft Position Switch Assembly
Manual Shift Shaft Position Switch Assembly harness is open or shorted
Manual Shift Shaft Position Switch Assembly circuit poor electrical connection

How to Fix the DTC P184B 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 P184B 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.

Need more information about the P184B Buick code?

Need more information on how to fix the P184B Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P184B Buick code diagnosed by a professional: Find a repair shop in your area

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 P184B Buick Code

1. What are common symptoms of OBDII code P184B in a Buick related to the Internal Mode Switch 2 S Circuit High Voltage?

- Common symptoms include issues with shifting gears, rough shifting, and the transmission staying in one gear.

2. What are possible causes of the Internal Mode Switch 2 S Circuit High Voltage OBDII code in a Buick?

- Possible causes may include a faulty internal mode switch, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose the Internal Mode Switch 2 S Circuit High Voltage code in my Buick?

- Diagnosis typically involves using a scan tool to retrieve the fault code, checking the internal mode switch and related wiring for damage, and testing the voltage levels.

4. Can driving with the P184B Buick code present cause further damage to the vehicle?

- Continuing to drive with this code present can potentially cause further damage to the transmission or other related components, so it's recommended to address the issue promptly.

5. Is it safe to continue driving my Buick if the transmission is experiencing issues related to the P184B code?

- It is not recommended to continue driving the vehicle if you are experiencing transmission issues related to this code, as it can lead to further damage and safety risks.

6. How can I repair the Internal Mode Switch 2 S Circuit High Voltage code in my Buick?

- Repairs may involve replacing the internal mode switch, repairing damaged wiring or connectors, or reprogramming the transmission control module.

7. Are there any DIY fixes for the P184B OBDII code in a Buick?

- DIY fixes may include checking and cleaning the connectors, inspecting the wiring for damage, and replacing the internal mode switch if necessary. However, professional diagnosis and repair are recommended for this issue.

8. How much does it typically cost to repair the Internal Mode Switch 2 S Circuit High Voltage code in a Buick?

- The cost of repair can vary depending on the exact cause of the issue, but it can range from a few hundred to over a thousand dollars, including parts and labor.

9. Can resetting the OBDII code P184B in my Buick make the issue go away temporarily?

- Resetting the code may temporarily clear the error message, but if the underlying issue causing the code is not addressed, it is likely to return.

10. How long does it take to repair the Internal Mode Switch 2 S Circuit High Voltage code in a Buick?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair, but it may take a few hours to a full day to complete the necessary repairs.