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Engine-Codes – RAM – U0168 RAM

U0168 RAM Code - Lost Communication With Vehicle Security Control Module

Quick Answer

The U0168 diagnostic trouble code indicates that there is a communication error between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). Common causes include Loose or corroded wiring connections, Faulty VSCM, Communication bus malfunction. 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
U0168 RAM indicates Lost Communication With Vehicle Security Control Module.
Common causes
Common causes include Loose or corroded wiring connections, Faulty VSCM, Communication bus malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code U0168 RAM Description

The U0168 diagnostic trouble code indicates that there is a communication error between the vehicle's onboard computer system and the Vehicle Security Control Module (VSCM). The VSCM is responsible for managing the security features of the vehicle, such as the immobilizer system, keyless entry, and alarm system. When communication with the VSCM is lost, it can lead to issues with the security functions of the vehicle, potentially causing it not to start or triggering false alarms.

OBDII Code U0168 RAM - Lost Communication With Vehicle Security Control Module
U0168 RAM Code - Lost Communication With Vehicle Security Control Module

Common Causes of U0168 RAM

  1. Loose or corroded wiring connections
  2. Faulty VSCM
  3. Communication bus malfunction
  4. Software glitches in the vehicle's computer system
  5. Impact damage to the VSCM or surrounding components

Symptoms of U0168 RAM

  1. Intermittent starting issues
  2. Inability to deactivate the alarm system
  3. Malfunctioning keyless entry system
  4. Security warning lights illuminated on the dashboard
  5. Vehicle immobilizer system activated

How to Fix U0168 RAM

  1. Check and repair any loose or corroded wiring connections.
  2. Test and potentially replace the VSCM if it is found to be faulty.
  3. Diagnose and repair any issues with the communication bus.
  4. Update or reprogram the vehicle's computer system to resolve software glitches.
  5. Inspect for and repair any impact damage to the VSCM or related components.

Cost to Fix U0168 RAM

The typical repair costs for addressing a U0168 code can range from $200 to $600, depending on the specific cause of the issue and the cost of replacement parts. Labor rates at auto repair shops can vary, but typically range between $80 and $150 per hour. It is recommended to consult with a trusted mechanic or dealership to get a more accurate estimate based on your vehicle make and model.

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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 U0168 RAM Code

1. What are common symptoms of OBDII code U0168 RAM - Lost Communication With Vehicle Security Control Module?

- Common symptoms include the vehicle's security system malfunctioning, the engine stalling, or the vehicle not starting.

2. What are possible causes of OBDII code U0168 RAM?

- Possible causes include a faulty vehicle security control module, damaged wiring or connectors, a blown fuse, or a software issue.

3. How can I diagnose the cause of OBDII code U0168 RAM?

- You can diagnose the cause by checking the wiring and connectors for damage, testing the vehicle security control module, and scanning for any other related trouble codes.

4. Can a DIY enthusiast repair OBDII code U0168 RAM?

- While some repairs, like checking and replacing fuses, can be done by a DIY enthusiast, complex issues with the vehicle security control module may require professional assistance.

5. Are there any temporary fixes for OBDII code U0168 RAM?

- Temporary fixes include checking and resetting the security system, ensuring all connectors are securely attached, and checking for blown fuses.

6. How much does it typically cost to repair OBDII code U0168 RAM?

- Repair costs can vary depending on the underlying issue, but it may range from $100 to $500 or more, including parts and labor.

7. Can OBDII code U0168 RAM cause any long-term damage to the vehicle?

- If left unresolved, the underlying issue causing the code can potentially lead to long-term damage to the vehicle's security system or other related components.

8. Is it safe to continue driving with OBDII code U0168 RAM present?

- It is not recommended to continue driving with this code present, as it can affect the vehicle's security system and lead to potential safety risks or further damage.

9. How long does it typically take to repair OBDII code U0168 RAM?

- The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and fix the problem.

10. Can resetting the OBDII system clear the U0168 RAM code?

- Resetting the OBDII system may clear the code temporarily, but if the underlying issue causing the communication loss is not addressed, the code is likely to reappear.

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