C1728 Code - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly
Quick Answer
The mode select switch communicates the operator's choice to the 4x4 module (PCM). Common causes include Transfer case, Integrated Wheel Ends (IWE), IWE solenoid. 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 indicates The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly.
- Common causes
- Common causes include Transfer case, Integrated Wheel Ends (IWE), IWE solenoid.
- 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 C1728 Description
What are the Possible Causes of the DTC C1728?
- Transfer case
- Integrated Wheel Ends (IWE)
- IWE solenoid
- 4x4 module (PCM)
- Front axle assembly
- Mode select switch (MSS)
How to Fix the DTC C1728?
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 C1728 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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Information for Specific Makes
- C1728 Ford — The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly
- C1728 Lincoln — The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly
- C1728 Mercury — The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly
Frequently Asked Questions about C1728 Code
1. What are the common symptoms of OBDII code C1728 related to the vehicle not shifting between 2WD and 4WD modes correctly?
The common symptoms include difficulty or failure to shift between 2WD and 4WD modes, dashboard warning lights related to the 4WD system, and unusual noises during shifting.
2. What are some possible causes of OBDII code C1728 indicating issues with shifting modes between 2WD and 4WD?
Potential causes include faulty transfer case control module, damaged wiring or connectors in the 4WD system, malfunctioning transfer case motor, or issues with the transfer case itself.
3. How can I diagnose the problem related to OBDII code C1728 for incorrect shifting between 2WD and 4WD modes?
Diagnose the issue by conducting a comprehensive inspection of the transfer case components, checking for any visible damage or loose connections, and using a professional OBDII scanner to retrieve specific diagnostic trouble codes.
4. What are some repair tips for resolving the issue indicated by OBDII code C1728 regarding improper shifting in the vehicle's 4WD system?
Repair tips may include repairing or replacing damaged wiring, connectors, or components in the 4WD system, resetting the transfer case control module, or recalibrating the transfer case motor as per manufacturer's recommendations.
5. Can driving with OBDII code C1728 causing shifting problems between 2WD and 4WD modes lead to further damage?
Continuing to drive with this issue can potentially cause damage to other components in the 4WD system, affect the vehicle's drivability, and compromise safety on different road conditions.
6. Is it safe to manually shift between 2WD and 4WD modes if OBDII code C1728 indicates a problem with automatic shifting?
It is not recommended to manually shift between modes if the automatic shifting is malfunctioning due to OBDII code C1728. Manual shifting can exacerbate the issue and lead to additional problems in the 4WD system.
7. How long does it typically take to repair OBDII code C1728-linked issues causing improper shifting between 2WD and 4WD modes?
The repair time can vary depending on the specific cause of the problem. Simple fixes like resetting the control module may take a short time, while complex repairs involving component replacements might require more time.
8. Can a DIY enthusiast without specialized tools or experience fix OBDII code C1728 related issues concerning shifting between 2WD and 4WD modes?
While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing complex issues related to OBDII code C1728 may require professional expertise and specialized tools.
9. Are there any preventive maintenance steps to avoid encountering OBDII code C1728 issues in the future?
Regularly inspecting the 4WD system components, keeping the transfer case well-maintained, and addressing any warning signs promptly can help prevent issues leading to OBDII code C1728 and improper shifting between 2WD and 4WD modes.
10. How much should I expect to spend on repairing OBDII code C1728 problems affecting the vehicle's shifting between 2WD and 4WD modes?
The cost of repairs can vary based on the specific cause of the issue, required parts replacements, labor charges, and whether you choose to go to a dealership, independent mechanic, or attempt some repairs yourself.
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