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U1408 Chrysler Code - Implausible Brake Signal Received

Quick Answer

The U1408 Chrysler code indicates that the vehicle's onboard computer has detected an implausible brake signal. Common causes include Faulty brake sensor, Malfunctioning brake control module, Wiring issues in the brake system. 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
U1408 Chrysler indicates Implausible Brake Signal Received.
Common causes
Common causes include Faulty brake sensor, Malfunctioning brake control module, Wiring issues in the brake system.
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 Sep 11, 2024
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Code U1408 Chrysler Description

The U1408 Chrysler code indicates that the vehicle's onboard computer has detected an implausible brake signal. This means that the signal received from the brake system does not align with what the computer expects to see based on the vehicle's operating conditions. This can lead to a variety of issues that affect the vehicle's performance and safety. When the brake signal is not accurate, the vehicle may experience braking problems, including delayed response times, decreased braking power, or even complete brake failure in extreme cases.

OBDII Code U1408 Chrysler - Implausible Brake Signal Received
U1408 Chrysler Code - Implausible Brake Signal Received

Common Causes of U1408 Chrysler

  1. Faulty brake sensor
  2. Malfunctioning brake control module
  3. Wiring issues in the brake system
  4. Low brake fluid levels
  5. Corrosion or damage to brake components

Symptoms of U1408 Chrysler

  1. ABS warning light illuminated on the dashboard
  2. Brake pedal feels spongy or unresponsive
  3. Brakes engage unexpectedly or release on their own
  4. Vehicle experiences abnormal braking behavior

How to Fix U1408 Chrysler

  1. Diagnose the issue by connecting a diagnostic scanner to the vehicle's onboard computer to retrieve the specific fault codes.
  2. Inspect the brake sensor and control module for any signs of damage or malfunction.
  3. Check the wiring in the brake system for any loose connections or damage.
  4. Replace the faulty brake sensor or control module if necessary.
  5. Clear the fault codes from the vehicle's computer and perform a test drive to ensure that the issue has been resolved.

Cost to Fix U1408 Chrysler

The cost of repairing an implausible brake signal issue can vary depending on the specific cause of the problem. In general, you can expect to pay anywhere from $100 to $500 for parts and labor. However, this is just a rough estimate, and the actual cost may be higher or lower depending on your location, the make and model of your vehicle, and the extent of the repairs needed. It's best to consult with a qualified mechanic to get a more accurate quote for your specific situation.

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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 U1408 Chrysler Code

1. What are the common symptoms of OBDII code U1408 in a Chrysler vehicle?

- The common symptoms include the ABS light illuminating on the dashboard, loss of communication with the brake system, and potential issues with the vehicle's traction control system.

2. What does the OBDII code U1408 "Implausible Brake Signal Received" mean in a Chrysler?

- This code indicates that the vehicle's onboard computer has detected a signal related to the brake system that is inconsistent or implausible, which may point to a communication error or malfunction within the brake system.

3. What are the possible causes of the U1408 code in a Chrysler vehicle?

- The possible causes include a faulty ABS module, damaged wiring or connectors in the brake system, a malfunctioning brake pedal position sensor, or issues with the CAN (Controller Area Network) communication system.

4. How can I diagnose the U1408 code in my Chrysler?

- Diagnosing the U1408 code typically involves using an OBDII scanner to retrieve the code and then conducting a thorough inspection of the brake system components, wiring, and connectors to identify any issues. Testing the brake pedal position sensor and ABS module may also be necessary.

5. Can I still drive my Chrysler with the U1408 code present?

- It is not recommended to drive the vehicle with the U1408 code present, as it may lead to potential safety hazards due to malfunctioning brake or ABS systems. It is advisable to address the issue promptly to ensure safe operation of the vehicle.

6. How can I repair the U1408 code in my Chrysler?

- Repairing the U1408 code may involve replacing a faulty ABS module, repairing damaged wiring or connectors, replacing the brake pedal position sensor if necessary, and ensuring proper communication within the brake system and CAN network.

7. Is it possible to reset the U1408 code in a Chrysler without fixing the underlying issue?

- While it is possible to reset the code using an OBDII scanner, it is not recommended to do so without addressing the root cause of the problem. Resetting the code without proper repair may lead to the issue recurring and potentially causing more significant problems.

8. How much does it typically cost to repair the U1408 code in a Chrysler?

- The cost of repairing the U1408 code can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to consult with a qualified mechanic for an accurate estimate.

9. Can a DIY enthusiast fix the U1408 code in a Chrysler?

- While some DIY enthusiasts may have the skills to diagnose and repair the U1408 code, addressing issues related to the brake system and ABS module can be complex and may require specialized tools and knowledge. It is recommended to seek professional assistance if unsure.

10. How often does the U1408 code occur in Chrysler vehicles?

- The occurrence of the U1408 code can vary depending on the vehicle's age, mileage, and maintenance history. It is considered a relatively uncommon OBDII code but can still occur due to various factors affecting the brake system and communication network in the vehicle.

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