U1439 RAM 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 RAM 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.
Code U1439 RAM Description
What are the Possible Causes of the DTC U1439 RAM?
- 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 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 U1439 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 U1439 RAM code?
Need more information on how to fix the U1439 RAM code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1439 RAM code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U1439 RAM Code
1. What are the common symptoms of OBDII code U1439 RAM (Implausible/Missing Programmed Axle Ratio)?
The common symptoms include illuminated Check Engine Light, erratic shifting, poor fuel efficiency, and potential drivability issues.
2. What can cause the OBDII code U1439 RAM to appear?
The code U1439 RAM may appear due to an incorrect axle ratio programmed in the vehicle's computer, a faulty wheel speed sensor, wiring issues, or a malfunctioning ABS module.
3. How can I diagnose the OBDII code U1439 RAM?
Diagnosis involves using an OBDII scanner to read the code, inspecting the wheel speed sensors and wiring for any damage, and verifying the programmed axle ratio in the vehicle's computer.
4. What are the possible repair options for OBDII code U1439 RAM?
Repair options include reprogramming the correct axle ratio into the vehicle's computer, replacing faulty wheel speed sensors, repairing damaged wiring, or addressing any issues with the ABS module.
5. Can I continue driving my vehicle with the OBDII code U1439 RAM present?
It is not recommended to drive the vehicle with the code U1439 RAM present, as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.
6. How much does it typically cost to repair OBDII code U1439 RAM?
The cost of repair can vary depending on the underlying cause of the code. Reprogramming the axle ratio may be less expensive than replacing faulty sensors or addressing wiring issues. It is best to consult a professional for an accurate estimate.
7. Will resetting the Check Engine Light make the OBDII code U1439 RAM disappear?
Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.
8. Can a DIY enthusiast fix the OBDII code U1439 RAM at home?
Depending on the cause of the code, some DIY enthusiasts may be able to address the issue at home, such as reprogramming the axle ratio. However, more complex issues may require professional diagnosis and repair.
9. How long does it take to repair OBDII code U1439 RAM?
The repair time can vary based on the specific cause of the code and the complexity of the repair needed. Simple fixes like reprogramming the axle ratio may take less time compared to diagnosing and replacing faulty components.
10. Is the OBDII code U1439 RAM a common issue in certain vehicle makes and models?
The code U1439 RAM can be more common in vehicles equipped with ABS systems and specific axle configurations. It is recommended to check with your vehicle manufacturer or a professional mechanic for any known issues related to this code.
Discuss the causes and fixes for U1439 RAM OBDII Code
Code U1439 RAM comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
