AutoCodes – Chevrolet – P184A Chevrolet

P184A Chevrolet Code - Internal Mode Switch 2 S Circuit Low 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: P184A Chevrolet indicates Internal Mode Switch 2 S Circuit Low 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 1,204

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 P184A 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 P184A Chevrolet - Internal Mode Switch 2 S Circuit Low Voltage - AutoCodes.com — P184A Chevrolet Code - Internal Mode Switch 2 S Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P184A 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 P184A 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 P184A 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 P184A Chevrolet Code

1. What are the common symptoms of OBDII code P184A on a Chevrolet related to the Internal Mode Switch 2 S Circuit Low Voltage?

- Common symptoms include issues with gear shifting, hesitation or lack of response when changing gears, and potential problems with the transmission's performance.

2. What are the possible causes of the Internal Mode Switch 2 S Circuit Low Voltage code P184A on a Chevrolet?

- The code may be triggered by a faulty internal mode switch, damaged wiring or connectors, low voltage in the circuit, or issues with the transmission control module.

3. How can I diagnose the Internal Mode Switch 2 S Circuit Low Voltage issue causing OBDII code P184A on my Chevrolet?

- Diagnosis typically involves checking the internal mode switch for proper operation, inspecting the wiring and connectors for damage, and testing the voltage in the circuit using a multimeter.

4. Can a DIY enthusiast repair the Internal Mode Switch 2 S Circuit Low Voltage issue triggering code P184A on a Chevrolet?

- While some aspects of the repair, such as checking for loose connections, can be performed by DIY enthusiasts, diagnosing and replacing more complex components may require professional expertise.

5. Is it safe to continue driving my Chevrolet with the OBDII code P184A due to the Internal Mode Switch 2 S Circuit Low Voltage problem?

- It is not recommended to continue driving the vehicle with this issue, as it can lead to further damage to the transmission and potentially compromise driving safety.

6. How much does it typically cost to repair the Internal Mode Switch 2 S Circuit Low Voltage issue causing OBDII code P184A on a Chevrolet?

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

7. Are there any preventive measures to avoid triggering the OBDII code P184A related to Internal Mode Switch 2 S Circuit Low Voltage on my Chevrolet?

- Regular maintenance, such as checking and servicing the transmission system, can help prevent issues that may lead to the code being triggered.

8. Can resetting the OBDII system clear the P184A code related to the Internal Mode Switch 2 S Circuit Low Voltage on a Chevrolet?

- Resetting the system may temporarily clear the code, but if the underlying issue causing the code is not addressed, it is likely to reappear after driving the vehicle again.

9. Will replacing the internal mode switch fix the OBDII code P184A issue on my Chevrolet?

- Replacing the internal mode switch may resolve the problem if it is determined to be the root cause of the code, but it's essential to diagnose the issue accurately before proceeding with any repairs.

10. Is it necessary to visit a dealership or a specialized mechanic to address the Internal Mode Switch 2 S Circuit Low Voltage issue causing OBDII code P184A on my Chevrolet?

- While a dealership or specialized mechanic may have the expertise and specific tools required for this repair, a qualified independent mechanic familiar with Chevrolet vehicles can also effectively diagnose and fix the issue.