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C1728 Ford Code - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly

Quick Answer

The C1728 Ford diagnostic trouble code (DTC) indicates that the vehicle is not shifting correctly between 2WD (two-wheel drive) and 4WD (four-wheel drive) modes. Common causes include Faulty transfer case control module, Malfunctioning electronic shift motor, Wiring or connector issues in the 4WD 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
C1728 Ford indicates The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly.
Common causes
Common causes include Faulty transfer case control module, Malfunctioning electronic shift motor, Wiring or connector issues in the 4WD 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 12, 2024
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Code C1728 Ford Description

The C1728 Ford diagnostic trouble code (DTC) indicates that the vehicle is not shifting correctly between 2WD (two-wheel drive) and 4WD (four-wheel drive) modes. This issue can significantly impact the vehicle's performance and safety, as the ability to switch between these modes is crucial for various driving conditions. When the vehicle fails to shift properly, it may result in reduced traction, stability, and control, especially in off-road or slippery road conditions.

OBDII Code C1728 Ford - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly
C1728 Ford Code - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly

Common Causes of C1728 Ford

  1. Faulty transfer case control module
  2. Malfunctioning electronic shift motor
  3. Wiring or connector issues in the 4WD system
  4. Low fluid levels in the transfer case
  5. Mechanical damage or wear in the transfer case components

Symptoms of C1728 Ford

  1. Difficulty shifting between 2WD and 4WD modes
  2. Illumination of the 4WD warning light on the dashboard
  3. Unusual noises or vibrations during shifting
  4. Inability to engage 4WD mode
  5. Reduced traction or stability in slippery road conditions

How to Fix C1728 Ford

  1. Begin by conducting a thorough diagnosis using a scan tool to retrieve the specific DTCs and pinpoint the exact cause of the issue.
  2. Inspect the transfer case control module and electronic shift motor for any visible damage or signs of malfunction. Replace any faulty components as necessary.
  3. Check the wiring harness and connectors in the 4WD system for loose connections, corrosion, or damage. Repair or replace any damaged wiring.
  4. Ensure that the transfer case fluid levels are adequate and top up or replace the fluid if necessary.
  5. Test the 4WD system after repairs to confirm that the vehicle can shift correctly between 2WD and 4WD modes.

Cost to Fix C1728 Ford

The typical repair costs for addressing the C1728 Ford code can vary depending on the specific cause of the issue and the parts and labor required for the repair. In general, repairing the transfer case control module or the electronic shift motor may cost between $300 and $800, including parts and labor. Additional costs may apply if there are wiring or connector issues that need to be addressed. It is advisable to consult with a professional mechanic or auto repair shop to obtain a more accurate estimate based on the vehicle's make and model, as well as the extent of the repairs needed. Keep in mind that labor rates can vary between different repair facilities, so it is recommended to inquire about local rates for a more precise cost estimate.

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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 C1728 Ford Code

1. What are the common symptoms of OBDII code C1728 in a Ford vehicle?

The common symptoms include difficulty shifting between 2WD and 4WD modes, inaccurate mode selection, and dashboard warning lights related to the 4WD system.

2. What could be causing the vehicle to not shift correctly between 2WD and 4WD modes?

Possible causes of this issue may include a faulty transfer case shift motor, damaged wiring harness, malfunctioning transfer case control module, or issues with the 4WD mode selector switch.

3. How can I diagnose the problem related to OBDII code C1728 in my Ford vehicle?

Diagnosing the issue involves conducting a thorough inspection of the transfer case components, checking for any damaged wiring, testing the transfer case shift motor, and scanning the transfer case control module for error codes.

4. Can I continue driving my vehicle with OBDII code C1728 without repairing it?

It is not recommended to continue driving the vehicle with this issue as it may lead to further damage to the transfer case components or affect the vehicle's drivability and safety.

5. How can I repair the issue with the vehicle not shifting correctly between 2WD and 4WD modes?

Repairing the problem may involve replacing the transfer case shift motor, repairing any damaged wiring, reprogramming the transfer case control module, or replacing the 4WD mode selector switch as needed.

6. Are there any DIY tips for fixing OBDII code C1728 in a Ford vehicle?

While some basic troubleshooting steps can be performed by DIY enthusiasts, it is advisable to seek professional help for diagnosing and repairing complex issues related to the transfer case and 4WD system.

7. Will resetting the vehicle's computer clear OBDII code C1728?

Resetting the vehicle's computer may temporarily clear the error code, but if the underlying issue causing the incorrect shifting between 2WD and 4WD modes is not addressed, the code is likely to reappear.

8. How much can I expect to pay for repairing OBDII code C1728 in a Ford vehicle?

The cost of repairing this issue can vary depending on the specific cause of the problem, the parts needed for replacement, and labor charges. It is advisable to consult a mechanic for an accurate estimate.

9. Is OBDII code C1728 specific to certain Ford models or is it common across different models?

OBDII code C1728 related to the incorrect shifting between 2WD and 4WD modes can be found in various Ford models equipped with electronic 4WD systems, such as trucks, SUVs, and crossovers.

10. Can extreme weather conditions affect the performance of the transfer case components and trigger OBDII code C1728?

Yes, extreme weather conditions, especially cold temperatures, can impact the functioning of the transfer case components, leading to issues with shifting between 2WD and 4WD modes and potentially triggering OBDII code C1728.

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