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P1838 Lincoln Code - Transmission Transfer Case Shift Motor Circuit Failure

Quick Answer

The P1838 diagnostic trouble code for Lincoln vehicles indicates a Transmission Transfer Case Shift Motor Circuit Failure. Common causes include Faulty transfer case shift motor, Damaged wiring or connectors in the transfer case shift motor circuit, Corrosion or debris affecting the transfer case shift motor operation. 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
P1838 Lincoln indicates Transmission Transfer Case Shift Motor Circuit Failure.
Common causes
Common causes include Faulty transfer case shift motor, Damaged wiring or connectors in the transfer case shift motor circuit, Corrosion or debris affecting the transfer case shift motor operation.
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 17, 2024
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Code P1838 Lincoln Description

The P1838 diagnostic trouble code for Lincoln vehicles indicates a Transmission Transfer Case Shift Motor Circuit Failure. This code is specifically related to the transfer case shift motor, which is responsible for engaging the transfer case to switch between two-wheel drive and four-wheel drive modes. When this circuit fails, it can lead to issues with the vehicle's drivetrain and overall performance.

OBDII Code P1838 Lincoln - Transmission Transfer Case Shift Motor Circuit Failure
P1838 Lincoln Code - Transmission Transfer Case Shift Motor Circuit Failure

Common Causes of P1838 Lincoln

  1. Faulty transfer case shift motor.
  2. Damaged wiring or connectors in the transfer case shift motor circuit.
  3. Corrosion or debris affecting the transfer case shift motor operation.
  4. Electrical issues such as blown fuses or relays related to the circuit.
  5. Software or programming issues affecting the transfer case shift motor control.

Symptoms of P1838 Lincoln

  1. Difficulty shifting between two-wheel drive and four-wheel drive modes.
  2. Vehicle getting stuck in either two-wheel drive or four-wheel drive mode.
  3. Unusual noises coming from the transfer case area.
  4. Dashboard warning lights related to the drivetrain system.

How to Fix P1838 Lincoln

  1. Begin by diagnosing the specific cause of the circuit failure using a diagnostic scanner to pinpoint the issue.
  2. Inspect the transfer case shift motor, wiring, and connectors for any visible damage or corrosion.
  3. Test the transfer case shift motor operation and electrical connections to ensure proper functionality.
  4. Replace any faulty components such as the transfer case shift motor, wiring, or connectors as needed.
  5. Clear the diagnostic trouble code from the vehicle's system and test drive to verify that the issue has been resolved.

Cost to Fix P1838 Lincoln

The typical repair costs for addressing a Transmission Transfer Case Shift Motor Circuit Failure can range from $200 to $600, including parts and labor. However, it's essential to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to inquire about local rates for a more accurate 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 P1838 Lincoln Code

1. What are the common symptoms of OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

The common symptoms include difficulty shifting gears, the transfer case not engaging or disengaging properly, and the vehicle getting stuck in a specific mode.

2. What are the possible causes of OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

The possible causes include a faulty transfer case shift motor, damaged wiring or connectors in the shift motor circuit, low transfer case fluid level, or a malfunctioning transfer case control module.

3. How can I diagnose OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

Diagnosis typically involves checking the transfer case shift motor for proper operation, inspecting the wiring and connectors for any damage, testing the transfer case fluid level, and scanning the transfer case control module for fault codes.

4. What are some repair tips for addressing OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

Repair tips may include replacing the transfer case shift motor if it is faulty, repairing or replacing damaged wiring and connectors, ensuring the transfer case fluid level is topped up, and resetting the transfer case control module.

5. Can OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure cause further damage if left unaddressed?

Yes, leaving this issue unresolved can lead to further damage to the transfer case components, potentially resulting in drivability issues and costly repairs down the line.

6. Is it safe to continue driving my Lincoln with OBDII code P1838 related to Transmission Transfer Case Shift Motor Circuit Failure?

It is not recommended to continue driving the vehicle with this code present, as it can affect the drivability and reliability of the vehicle. It is best to address the issue promptly.

7. How much does it typically cost to repair OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

The cost of repair can vary depending on the specific cause of the issue, but it may involve parts and labor costs for replacing the transfer case shift motor, repairing wiring, and any necessary diagnostic fees.

8. Can I reset the OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure myself?

While you can clear the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from recurring. It is recommended to diagnose and repair the problem to ensure proper vehicle operation.

9. Are there any recalls or technical service bulletins related to OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

It is advisable to check with your local Lincoln dealership or online resources for any recalls or technical service bulletins related to this specific OBDII code to see if there are any known issues or remedies provided by the manufacturer.

10. How long does it typically take to repair OBDII code P1838 in a Lincoln related to Transmission Transfer Case Shift Motor Circuit Failure?

The repair time can vary depending on the extent of the issue and the availability of parts. It is best to consult with a qualified mechanic or technician to get an accurate estimate of the repair timeline.

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