AutoCodes – RAM – U0019 RAM

U0019 RAM Code - Low Speed CAN Communication Bus

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module. 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: U0019 RAM indicates Low Speed CAN Communication Bus.
Common causes: Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module.
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 949

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 15, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0019 RAM Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0019 RAM - Low Speed CAN Communication Bus - AutoCodes.com — U0019 RAM Code - Low Speed CAN Communication Bus

What does this mean?

What are the Possible Causes of the DTC U0019 RAM?

Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0019 RAM?

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 U0019 RAM 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 U0019 RAM code?

Need more information on how to fix the U0019 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0019 RAM 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 U0019 RAM Code

1. What are the common symptoms of OBDII code U0019 related to the Low Speed CAN Communication Bus in a RAM vehicle?

- Common symptoms include issues with the vehicle's transmission shifting, dashboard warning lights illuminating, and problems with the cruise control system.

2. What are some possible causes of OBDII code U0019 in a RAM vehicle?

- Possible causes include damaged wiring or connectors in the CAN bus system, faulty control modules, or a malfunctioning CAN bus network.

3. How can I diagnose OBDII code U0019 in my RAM vehicle?

- To diagnose this code, you can use a diagnostic scanner to retrieve the specific trouble codes, check the wiring and connectors in the CAN bus system, and perform a thorough inspection of the control modules.

4. What are some repair tips for fixing OBDII code U0019 related to the Low Speed CAN Communication Bus in a RAM vehicle?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing faulty control modules, and ensuring proper communication within the CAN bus network.

5. Can I drive my RAM vehicle with OBDII code U0019 present?

- It is not recommended to drive the vehicle with this code present, as it could lead to further damage or safety issues. It is best to address the underlying cause of the code before continuing to drive the vehicle.

6. How much does it typically cost to repair OBDII code U0019 in a RAM vehicle?

- The cost of repairing this code can vary depending on the specific cause, parts needed for replacement, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

7. Can resetting the OBDII code U0019 in my RAM vehicle fix the issue?

- Resetting the code may temporarily clear the warning lights, but it will not fix the underlying issue causing the code. It is important to diagnose and repair the root cause of the problem.

8. Is OBDII code U0019 specific to RAM vehicles only?

- While this code may be commonly associated with RAM vehicles, it can also occur in other vehicle makes and models that utilize a CAN bus communication system.

9. How long does it take to repair OBDII code U0019 in a RAM vehicle?

- The repair time can vary depending on the complexity of the issue, availability of parts, and the expertise of the mechanic. Some repairs may be completed within a few hours, while others may take longer.

10. Can I prevent OBDII code U0019 from occurring in my RAM vehicle?

- Regular maintenance, proper care of the vehicle's electrical system, and addressing any warning signs promptly can help prevent the occurrence of OBDII code U0019 related to the Low Speed CAN Communication Bus in a RAM vehicle.