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P1857 Ford Code - Transfer Case Contact Plate 'C' Short Circuit To Ground

Quick Answer

The P1857 Ford code indicates a short circuit to ground in the transfer case contact plate 'C'. Common causes include Wiring harness damage or corrosion leading to a short circuit, Faulty transfer case contact plate 'C', Poor electrical connections in the transfer case control 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
P1857 Ford indicates Transfer Case Contact Plate 'C' Short Circuit To Ground.
Common causes
Common causes include Wiring harness damage or corrosion leading to a short circuit, Faulty transfer case contact plate 'C', Poor electrical connections in the transfer case control 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 09, 2024
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Code P1857 Ford Description

The P1857 Ford code indicates a short circuit to ground in the transfer case contact plate 'C'. The transfer case is a critical component of a four-wheel-drive or all-wheel-drive vehicle, responsible for distributing power between the front and rear axles for optimal traction. The contact plate 'C' is part of the transfer case control system, which helps to engage and disengage the different modes of the transfer case, such as two-wheel drive, four-wheel drive high, and four-wheel drive low.

OBDII Code P1857 Ford - Transfer Case Contact Plate 'C' Short Circuit To Ground
P1857 Ford Code - Transfer Case Contact Plate 'C' Short Circuit To Ground

Common Causes of P1857 Ford

  1. Wiring harness damage or corrosion leading to a short circuit
  2. Faulty transfer case contact plate 'C'
  3. Poor electrical connections in the transfer case control system
  4. Water intrusion or contamination in the transfer case components
  5. Electrical system malfunction or short circuit elsewhere in the vehicle

Symptoms of P1857 Ford

  1. Illumination of the 4WD warning light on the dashboard
  2. Difficulty shifting between drive modes (e.g., from 2WD to 4WD)
  3. Unintended activation of the four-wheel-drive system
  4. Loss of power or acceleration
  5. Vehicle getting stuck in a specific drive mode

How to Fix P1857 Ford

  1. Begin by conducting a thorough visual inspection of the wiring harness and connections related to the transfer case contact plate 'C'. Look for any signs of damage, corrosion, or loose connections.
  2. Test the transfer case contact plate 'C' for proper functionality using a multimeter to check for continuity and resistance. Replace the contact plate if it is found to be faulty.
  3. Inspect the transfer case control module and associated components for any signs of water intrusion or contamination. Clean and dry the components as needed.
  4. Clear the diagnostic trouble codes from the vehicle's computer using a scan tool after completing the repair to reset the system and ensure the issue has been resolved.
  5. Perform a road test to verify that the transfer case is shifting correctly between drive modes and that the symptoms associated with the P1857 Ford code have been eliminated.

Cost to Fix P1857 Ford

The cost of repairing a short circuit to ground in the transfer case contact plate 'C' can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair could range from $100 to $300, with labor costs adding an additional $150 to $300. Overall, the total repair cost could fall between $250 and $600. It is important to keep in mind that these are rough estimates, and actual costs may vary based on factors such as the vehicle's make and model, the location of the repair, and any additional repairs or services required. It is advisable to consult with a trusted mechanic or repair shop to get a more accurate cost estimate for this specific issue.

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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 P1857 Ford Code

1. What are the common symptoms of OBDII code P1857 in a Ford related to the Transfer Case Contact Plate 'C' short circuit to ground?

The common symptoms include the check engine light being illuminated, difficulty shifting gears, and potential issues with the transfer case.

2. What are the possible causes of OBDII code P1857 in a Ford indicating a Transfer Case Contact Plate 'C' short circuit to ground?

Possible causes include damaged wiring or connectors, a faulty contact plate 'C', or issues with the transfer case motor.

3. How can I diagnose OBDII code P1857 in a Ford related to the Transfer Case Contact Plate 'C' short circuit to ground?

Diagnosis involves using a scan tool to retrieve the specific code, inspecting the wiring and connectors for damage, and testing the contact plate 'C' and transfer case motor for proper functioning.

4. Can I continue to drive my Ford with OBDII code P1857 indicating a Transfer Case Contact Plate 'C' short circuit to ground?

It is not recommended to continue driving the vehicle with this code, as it can lead to further damage to the transfer case components and potentially cause safety issues.

5. How can I repair OBDII code P1857 in a Ford related to the Transfer Case Contact Plate 'C' short circuit to ground?

Repair involves fixing any damaged wiring or connectors, replacing the faulty contact plate 'C' if needed, and addressing any issues with the transfer case motor.

6. Are there any DIY tips for addressing OBDII code P1857 in a Ford indicating a Transfer Case Contact Plate 'C' short circuit to ground?

While simple tasks like checking for loose connections can be done DIY, it is recommended to have a professional diagnose and repair the issue to ensure proper resolution.

7. How much does it typically cost to fix OBDII code P1857 in a Ford related to the Transfer Case Contact Plate 'C' short circuit to ground?

The cost can vary depending on the extent of the damage and the specific repairs needed, but it is advisable to budget for both diagnostic fees and potential parts and labor costs.

8. Can weather conditions or off-road driving contribute to triggering OBDII code P1857 in a Ford for Transfer Case Contact Plate 'C' short circuit to ground?

Extreme weather conditions or rough terrain can potentially contribute to the development of issues leading to this code, especially if they cause damage to the vehicle's components.

9. Is resetting the OBDII system an effective way to temporarily clear OBDII code P1857 in a Ford due to Transfer Case Contact Plate 'C' short circuit to ground?

Resetting the system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem persists.

10. Can OBDII code P1857 in a Ford related to a Transfer Case Contact Plate 'C' short circuit to ground affect the vehicle's drivability?

Yes, this code can affect the vehicle's drivability by causing issues with shifting gears and potentially impacting the overall performance of the transfer case system.

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