AutoCodes – Lincoln – C1728 Lincoln

C1728 Lincoln 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 Lincoln 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 829
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 15, 2020
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Code C1728 Lincoln 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 Lincoln - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly - AutoCodes.com
C1728 Lincoln Code - The Vehicle Does Not Shift Between 2WD And 4WD Modes Correctly

What are the Possible Causes of the DTC C1728 Lincoln?

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

How to Fix the DTC C1728 Lincoln?

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 Lincoln 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 Lincoln code?

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

Need Help with the Code?

Get the C1728 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 Lincoln Code

1. What are the common symptoms of OBDII code C1728 in a Lincoln related to shifting between 2WD and 4WD modes?

The common symptoms include difficulty shifting between 2WD and 4WD modes, the vehicle getting stuck in one mode, or a warning light illuminating on the dashboard.

2. What are the possible causes of OBDII code C1728 in a Lincoln affecting the shifting between 2WD and 4WD modes?

Potential causes can include issues with the transfer case motor, faulty wiring connections, sensor malfunctions, or problems with the control module.

3. How can I diagnose the root cause of OBDII code C1728 in my Lincoln for incorrect shifting between 2WD and 4WD modes?

To diagnose the issue, you can perform a thorough visual inspection of the wiring, check the transfer case motor for proper functioning, and use a diagnostic scanner to retrieve specific fault codes.

4. Are there any DIY repair tips for fixing OBDII code C1728 in a Lincoln related to the shifting problem between 2WD and 4WD modes?

DIY repair tips may include checking and cleaning electrical connections, ensuring proper grounding, and replacing any damaged components like sensors or the transfer case motor if necessary.

5. Can OBDII code C1728 in a Lincoln impacting the shift between 2WD and 4WD modes be reset without fixing the underlying issue?

Resetting the code without addressing the root cause may temporarily clear the warning light, but the shifting problem between 2WD and 4WD modes will likely persist until the issue is properly repaired.

6. Is it safe to continue driving my Lincoln with OBDII code C1728 affecting the ability to shift between 2WD and 4WD modes?

It is not recommended to drive the vehicle if you are experiencing shifting issues between 2WD and 4WD modes, as it can affect the vehicle's drivability and safety, especially in certain road or weather conditions.

7. How much can I expect to pay for professional repairs related to OBDII code C1728 in a Lincoln causing problems with shifting between 2WD and 4WD modes?

The cost of repairs can vary depending on the specific issue, but it is advisable to budget for diagnostic fees, parts replacement costs, and labor charges, which can range from a few hundred to over a thousand dollars.

8. Are there any recalls or technical service bulletins related to OBDII code C1728 in Lincolns and the shifting between 2WD and 4WD modes?

It's recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins addressing OBDII code C1728 and related shifting issues in specific Lincoln models.

9. Can extreme weather conditions or off-road driving contribute to triggering OBDII code C1728 in a Lincoln and causing 2WD/4WD mode shifting problems?

Extreme weather conditions or off-road driving can potentially exacerbate existing issues that trigger OBDII code C1728, leading to problems with shifting between 2WD and 4WD modes in a Lincoln.

10. How often should I check the shifting functionality between 2WD and 4WD modes in my Lincoln to prevent issues related to OBDII code C1728?

Regularly inspecting and testing the shifting functionality between 2WD and 4WD modes, especially before embarking on off-road adventures or in challenging driving conditions, can help prevent issues related to OBDII code C1728 in a Lincoln.

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