AutoCodes – Chrysler – U1439 Chrysler

U1439 Chrysler Code - Implausible/Missing Programmed Axle Ratio

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) reports via Controller Area Network (CAN) message that the axle ratio signal is not available. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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: U1439 Chrysler indicates Implausible/Missing Programmed Axle Ratio.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module 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 656

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 May 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1439 Chrysler Description

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) reports via Controller Area Network (CAN) message that the axle ratio signal is not available.

OBDII Code U1439 Chrysler - Implausible/Missing Programmed Axle Ratio - AutoCodes.com — U1439 Chrysler Code - Implausible/Missing Programmed Axle Ratio

What does this mean?

What are the Possible Causes of the DTC U1439 Chrysler?

Faulty Body Control Module (BCM)
Body Control Module harness is open or shorted
Body Control Module circuit poor electrical connection

How to Fix the DTC U1439 Chrysler?

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 U1439 Chrysler 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 U1439 Chrysler Code

1. What does the OBDII code U1439 for Chrysler mean?

The U1439 code indicates an implausible or missing programmed axle ratio in the vehicle's computer system.

2. What are the common symptoms of U1439 code in a Chrysler vehicle?

Common symptoms may include incorrect speedometer readings, issues with the vehicle's transmission shifting, and illuminated warning lights on the dashboard.

3. What can cause the U1439 code to be triggered in a Chrysler car?

The U1439 code may be triggered due to a faulty wheel speed sensor, damaged wiring related to the axle ratio system, or a problem with the vehicle's computer module.

4. How serious is an U1439 fault code in a Chrysler vehicle?

While the U1439 code may not affect the drivability of the vehicle, it can lead to inaccurate data being sent to the vehicle's computer system, potentially causing performance issues.

5. How do I diagnose the U1439 code in my Chrysler car?

Diagnosing the U1439 code typically involves using a diagnostic scanner to retrieve the specific details of the fault code and conducting a thorough inspection of the axle ratio components.

6. Can I drive my Chrysler with the U1439 code present?

It is generally not recommended to drive the vehicle with the U1439 code present, as it can impact the accuracy of the vehicle's speed readings and transmission performance.

7. How can I repair the U1439 code in my Chrysler?

Repairing the U1439 code may involve replacing a faulty wheel speed sensor, repairing damaged wiring, or reprogramming the vehicle's computer system to correct the axle ratio data.

8. Will the U1439 code reset itself after repairs are completed?

After the necessary repairs have been made, the U1439 code can be cleared using a diagnostic scanner. If the underlying issue has been successfully resolved, the code should not reappear.

9. Can I fix the U1439 code in my Chrysler myself?

While some DIY enthusiasts may attempt to address the U1439 code, it is recommended to consult a professional mechanic with experience in diagnosing and repairing electronic control system faults.

10. How much does it cost to fix the U1439 code in a Chrysler vehicle?

The cost of fixing the U1439 code can vary depending on the specific cause of the issue, the required repairs, and labor costs. It is advisable to obtain quotes from different auto repair shops for an accurate estimate.