AutoCodes – Chevrolet – P183B Chevrolet

P183B Chevrolet 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 Chevrolet 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 1,037

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

What does this mean?

What are the Possible Causes of the DTC P183B 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 P183B 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 P183B 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 P183B Chevrolet Code

1. What are the common symptoms of OBDII code P183B in a Chevrolet related to the Internal Mode Switch 2 D1 Circuit High Voltage?

The common symptoms include issues with shifting gears, a stuck gear indicator, and the inability to start the vehicle.

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

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

3. How serious is OBDII code P183B in a Chevrolet?

This code can lead to drivability issues and potential safety concerns, so it is important to address it promptly.

4. How can I diagnose OBDII code P183B in a Chevrolet?

Diagnosis typically involves using a scan tool to read the code, inspecting the internal mode switch and related components, and performing circuit tests to identify the issue.

5. Can I drive my Chevrolet with OBDII code P183B?

It is not recommended to drive the vehicle with this code present, as it can cause transmission problems and affect the overall drivability of the vehicle.

6. How can I repair OBDII code P183B in a Chevrolet?

Repair options may include replacing the internal mode switch, repairing damaged wiring or connectors, or reprogramming the transmission control module.

7. Is it possible to reset OBDII code P183B in a Chevrolet without fixing the underlying issue?

While clearing the code may temporarily turn off the check engine light, the issue will likely reoccur if the root cause is not addressed.

8. Are there any DIY tips for fixing OBDII code P183B in a Chevrolet?

DIY tips may include checking and cleaning the connectors in the circuit, ensuring proper wiring connections, and following a detailed repair manual for guidance.

9. Can a mechanic easily fix OBDII code P183B in a Chevrolet?

A qualified mechanic with experience in transmission systems should be able to diagnose and repair this code effectively.

10. How much does it cost to repair OBDII code P183B in a Chevrolet?

The cost of repairs can vary depending on the exact cause of the issue, parts needed, labor rates, and whether the repair is done at a dealership or an independent repair shop.