AutoCodes – Dodge – C149B Dodge

C149B Dodge Code - Rear Driveline Module

Quick Answer

The Drive Train Control Module (DTCM) monitors the Rear Driveline Module (RDM). Common causes include Faulty Rear Driveline Module (RDM), Rear Driveline Module (RDM) harness is open or shorted, Rear Driveline Module (RDM) 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: C149B Dodge indicates Rear Driveline Module.
Common causes: Common causes include Faulty Rear Driveline Module (RDM), Rear Driveline Module (RDM) harness is open or shorted, Rear Driveline Module (RDM) 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 798

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 Oct 15, 2020

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

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

Code C149B Dodge Description

The Drive Train Control Module (DTCM) monitors the Rear Driveline Module (RDM). The DTCM sets the OBDII code when it detects that the Rear Driveline Module (RDM) system voltage is below or above normal voltage, or an overheating condition due to excessive usage of components from hard driving conditions (Mud, Sand, Snow, 2WD Chassis dynamometer etc.) or ambient temperatures.

OBDII Code C149B Dodge - Rear Driveline Module - AutoCodes.com — C149B Dodge Code - Rear Driveline Module

What does this mean?

What are the Possible Causes of the DTC C149B Dodge?

Faulty Rear Driveline Module (RDM)
Rear Driveline Module (RDM) harness is open or shorted
Rear Driveline Module (RDM) circuit poor electrical connection
Faulty Drive Train Control Module (DTCM)

How to Fix the DTC C149B Dodge?

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 does this mean?

Code Tech Notes

C149B-16-RDM - CIRCUIT VOLTAGE BELOW THRESHOLD
C149B-17-RDM - CIRCUIT VOLTAGE ABOVE THRESHOLD
C149B-98-RDM - COMPONENT OR SYSTEM OVER TEMPERATURE

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C149B Dodge 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 C149B Dodge code?

Need more information on how to fix the C149B Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C149B Dodge 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 C149B Dodge Code

What does the OBDII code C149B mean for a Dodge vehicle?

C149B indicates an issue with the rear driveline module, which is responsible for monitoring and controlling the rear driveline system.

What are common symptoms associated with the C149B code?

Common symptoms may include warning lights on the dashboard, reduced power to the rear wheels, or unusual sounds from the driveline when driving.

What could cause the C149B code to trigger?

Causes may include a faulty rear driveline module, issues with wiring or connectors, sensor malfunctions, or problems with the rear differential.

How can I diagnose the C149B code?

To diagnose C149B, use an OBDII scanner to confirm the code, inspect wiring and connectors for damage, and check the functionality of the rear driveline module and related sensors.

What are some potential repair options for the C149B code?

Repair options may include replacing the rear driveline module, repairing damaged wiring or connectors, or replacing faulty sensors related to the driveline system.

Can I drive my Dodge with the C149B code?

While it may be possible to drive the vehicle, it is not recommended as it could lead to further damage to the driveline system and compromise safety.

How do I clear the C149B code after repairs?

You can clear the C149B code using an OBDII scanner or by disconnecting the vehicle's battery for a short period, but ensure the underlying issue is resolved first.

Will the C149B code affect my vehicle's performance?

Yes, the C149B code can impact vehicle performance, particularly in terms of traction and power delivery to the rear wheels.

Is a professional diagnosis necessary for the C149B code?

While some DIY diagnostics may be possible, a professional diagnosis is recommended to accurately identify and resolve the underlying issue effectively.