AutoCodes – Generic – P183B

P183B Code - Internal Mode Switch 2 D1 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: P183B indicates Internal Mode Switch 2 D1 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 8,018

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 P183B 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 P183B - Internal Mode Switch 2 D1 Circuit High Voltage - AutoCodes.com — P183B Code - Internal Mode Switch 2 D1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P183B?

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 P183B?

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 P183B 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 P183B code?

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Need Help with the Code?

Get the P183B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P183B Buick — Internal Mode Switch 2 D1 Circuit High Voltage
P183B Cadillac — Internal Mode Switch 2 D1 Circuit High Voltage
P183B Chevrolet — Internal Mode Switch 2 D1 Circuit High Voltage
P183B GMC — Internal Mode Switch 2 D1 Circuit High Voltage
P183B Infiniti — Solenoid Power Supply
P183B Nissan — Solenoid Power Supply

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 P183B Code

1. What are the common symptoms of OBDII code P183B (Internal Mode Switch 2 D1 Circuit High Voltage)?

- Common symptoms include issues with shifting gears, hesitation or jerking during acceleration, and the transmission staying in one gear.

2. What are the possible causes of OBDII code P183B?

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

3. How serious is OBDII code P183B?

- OBDII code P183B can lead to drivability issues and potential transmission damage if not addressed promptly. It is recommended to address this code as soon as possible.

4. How do I diagnose OBDII code P183B?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, testing the internal mode switch and related circuitry, and inspecting wiring and connectors for any damage.

5. Can I continue driving with OBDII code P183B present?

- It is not recommended to continue driving with OBDII code P183B present, as it can lead to further transmission issues and potential safety hazards on the road.

6. How can I repair OBDII code P183B?

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

7. Will resetting the OBDII code P183B make it go away permanently?

- Resetting the code may clear it temporarily, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the code.

8. How much does it cost to fix OBDII code P183B?

- The cost of fixing OBDII code P183B can vary depending on the specific cause of the issue, the extent of the repairs needed, and the labor rates of the repair shop. It is advisable to obtain a few quotes for an accurate estimate.

9. Can I fix OBDII code P183B myself?

- While some DIY enthusiasts may attempt to fix this code themselves, it is recommended to have a professional diagnose and repair the issue, especially when it involves the transmission system.

10. How can I prevent OBDII code P183B from occurring again?

- Regular maintenance of the transmission system, including checking for any signs of wear or damage, can help prevent OBDII code P183B from occurring again. Additionally, addressing any related codes promptly can help maintain the health of the transmission system.