AutoCodes – Ford – C1728 Ford

C1728 Ford 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 Ford 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.

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Code Popularity 9,922

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 Aug 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1728 Ford Description

The mode select switch communicates the operator's choice to the 4x4 module (PCM). The 4x4 module (PCM) then controls the transfer case clutch, transfer case motor and Integrated Wheel Ends (IWEs) as necessary. If the vehicle is not responding to the operator's intentions, systematically check the necessary inputs and outputs of the 4x4 module (PCM), components of the transfer case, IWE components and half shafts. Check all circuits for opens and shorts to power or ground.

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

What does this mean?

What are the Possible Causes of the DTC C1728 Ford?

Transfer case
Integrated Wheel Ends (IWE)
IWE solenoid
4x4 module (PCM)
Front axle assembly
Mode select switch (MSS)

How to Fix the DTC C1728 Ford?

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 Ford 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 C1728 Ford code?

Need more information on how to fix the C1728 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.