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U1440 Dodge Code - Implausible/Missing Programmed Transfer Case Hi Ratio

Quick Answer

The U1440 code for Dodge vehicles indicates an issue with the programmed transfer case high ratio, specifically that the programmed ratio is either missing or implausible. Common causes include Faulty transfer case control module, Wiring or connector issues between the control module and transfer case, Mechanical problems within the transfer case itself. 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
U1440 Dodge indicates Implausible/Missing Programmed Transfer Case Hi Ratio.
Common causes
Common causes include Faulty transfer case control module, Wiring or connector issues between the control module and transfer case, Mechanical problems within the transfer case itself.
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 U1440 Dodge Description

The U1440 code for Dodge vehicles indicates an issue with the programmed transfer case high ratio, specifically that the programmed ratio is either missing or implausible. The transfer case is a crucial component in four-wheel drive and all-wheel drive vehicles, responsible for transferring power from the transmission to the front and rear axles. The high ratio setting refers to the gear ratio used for high-speed driving or off-road situations where extra power is needed.

OBDII Code U1440 Dodge - Implausible/Missing Programmed Transfer Case Hi Ratio
U1440 Dodge Code - Implausible/Missing Programmed Transfer Case Hi Ratio

Common Causes of U1440 Dodge

  1. Faulty transfer case control module
  2. Wiring or connector issues between the control module and transfer case
  3. Mechanical problems within the transfer case itself
  4. Software glitches or programming errors
  5. Electrical system malfunctions affecting the transfer case operation

Symptoms of U1440 Dodge

  1. Difficulty engaging four-wheel drive
  2. Unusual noises coming from the transfer case
  3. Dashboard warning lights related to 4WD system
  4. Reduced power or acceleration
  5. Shifting issues when driving in high gear ratios

How to Fix U1440 Dodge

  1. Begin by performing a thorough diagnostic scan using a professional OBD-II scanner to confirm the U1440 code and identify any other related codes.
  2. Inspect the wiring harness and connectors between the transfer case control module and the transfer case for any signs of damage or corrosion. Repair or replace as needed.
  3. Check the transfer case control module for proper functionality and reprogram if necessary to ensure the correct high ratio setting is programmed.
  4. Test drive the vehicle to verify that the transfer case is operating correctly and that the U1440 code does not return.
  5. Clear the diagnostic trouble codes from the vehicle's memory and reset the system to complete the repair process.

Cost to Fix U1440 Dodge

The typical repair costs for addressing the U1440 code on a Dodge vehicle can vary depending on the specific cause of the issue. In general, you can expect to pay anywhere from $200 to $500 for parts and labor. Keep in mind that labor rates at auto repair shops can fluctuate based on location and other factors, so it's advisable to obtain quotes from multiple sources before proceeding with the repair. Additionally, the cost may increase if additional components need to be replaced or if the transfer case itself requires servicing.

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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 U1440 Dodge Code

1. What does the OBDII code U1440 mean on a Dodge vehicle?

U1440 indicates "Implausible/Missing Programmed Transfer Case Hi Ratio," meaning the transfer case high-range ratio data is invalid or absent in the vehicle’s communication system.

2. What are the common symptoms of the U1440 code?

Symptoms may include the Check Engine Light or Service 4WD Light illuminating, difficulties shifting between transfer case modes, or the 4WD system not functioning properly.

3. What causes the U1440 code to appear on a Dodge?

Common causes include a malfunctioning transfer case control module (TCCM), faulty wiring or connections, corrupted programming, or incorrect transfer case ratio data.

4. Can a faulty sensor cause the U1440 code?

Yes, a faulty transfer case position sensor or encoder motor sensor can send incorrect data, triggering the U1440 code.

5. How do you diagnose the U1440 code on a Dodge?

Diagnose by using a scan tool to check for related codes, inspecting the wiring and connectors to the transfer case control module, and verifying the programmed transfer case data is correct.

6. Can the U1440 code be fixed with a software update?

In some cases, reprogramming or updating the transfer case control module software can resolve the issue if the fault is due to corrupted or missing data.

7. Can I drive with the U1440 code active?

Driving may be possible, but it’s not recommended since the 4WD system might not function correctly, potentially affecting vehicle handling off-road or in slippery conditions.

8. How much does it cost to fix the U1440 code?

Repair costs vary depending on the issue, ranging from $100–$300 for wiring repairs to $500–$1,000 for module replacement and programming.

9. Will clearing the code fix the problem?

Simply clearing the code without addressing the underlying issue will not fix the problem, and the code is likely to return.

10. Can a worn-out transfer case cause the U1440 code?

Yes, internal damage or wear in the transfer case can lead to incorrect ratio readings, potentially triggering this code.

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