AutoCodes – Chevrolet – P184B Chevrolet

P184B Chevrolet 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 Chevrolet 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.

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Code Popularity 1,133

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

What does this mean?

What are the Possible Causes of the DTC P184B Chevrolet?

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 Chevrolet?

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 Chevrolet 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 P184B Chevrolet Code

1. What are the common symptoms of OBDII code P184B (Chevrolet) Internal Mode Switch 2 S Circuit High Voltage?

The common symptoms include issues with shifting gears, transmission slipping, and the Check Engine light being illuminated.

2. What are the possible causes of OBDII code P184B (Chevrolet)?

The possible causes of this code include a faulty internal mode switch, damaged wiring or connectors, or a malfunctioning transmission control module.

3. How can I diagnose OBDII code P184B (Chevrolet)?

Diagnosis involves using a scan tool to retrieve the trouble code and inspecting the internal mode switch, wiring, and connectors for any signs of damage or wear.

4. Can I still drive my vehicle with OBDII code P184B (Chevrolet) present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the transmission and affect the vehicle's drivability.

5. How can I repair OBDII code P184B (Chevrolet)?

Repairing this code typically involves replacing the internal mode switch, repairing any damaged wiring or connectors, and clearing the trouble code with a scan tool.

6. Is it possible to reset OBDII code P184B (Chevrolet) without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily turn off the Check Engine light, but the issue will likely reoccur until properly repaired.

7. How much does it cost to fix OBDII code P184B (Chevrolet)?

The cost of fixing this code can vary depending on the specific cause of the issue, but it may involve parts and labor costs for the replacement of the internal mode switch or repair of wiring.

8. Can a DIY enthusiast repair OBDII code P184B (Chevrolet)?

While some experienced DIY enthusiasts may be able to diagnose and repair this code, it is recommended to consult a professional mechanic for proper diagnosis and repair to avoid further damage.

9. Are there any preventive maintenance tips to avoid OBDII code P184B (Chevrolet)?

Regularly inspecting and maintaining the transmission system, including checking for leaks and ensuring proper fluid levels, can help prevent issues that may trigger this trouble code.

10. Will OBDII code P184B (Chevrolet) affect the vehicle's performance?

Yes, this code can affect the vehicle's performance by causing transmission-related issues such as difficulty shifting gears and transmission slipping, impacting overall drivability.