P1859 Ford Code - Transmission Transfer Case Contact Plate 'D' Open Circuit
Quick Answer
The Transmission Control Module (TCM) monitors the Transmission Transfer Case Contact Plate 'D'. Common causes include Faulty Transfer Case Shift Motor, Transfer Case Shift Motor harness is open or shorted, Transfer Case Shift Motor circuit poor electrical connection. 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
- P1859 Ford indicates Transmission Transfer Case Contact Plate 'D' Open Circuit.
- Common causes
- Common causes include Faulty Transfer Case Shift Motor, Transfer Case Shift Motor harness is open or shorted, Transfer Case Shift Motor circuit poor electrical connection.
- 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 P1859 Ford Description
What are the Possible Causes of the DTC P1859 Ford?
- Faulty Transfer Case Shift Motor
- Transfer Case Shift Motor harness is open or shorted
- Transfer Case Shift Motor circuit poor electrical connection
How to Fix the DTC P1859 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 P1859 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 P1859 Ford code?
Need more information on how to fix the P1859 Ford code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1859 Ford code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1859 Ford Code
What does the OBDII code P1859 mean on a Ford vehicle?
The P1859 code indicates an open circuit in the transmission transfer case contact plate 'D,' which is part of the system that manages the transfer case's gear selection.
What are the common symptoms of a P1859 code on a Ford?
Symptoms may include the 4WD system not engaging or disengaging properly, warning lights on the dashboard, and erratic transfer case operation.
What causes the P1859 code to appear in a Ford vehicle?
Common causes include a faulty transfer case contact plate, damaged wiring or connectors, corrosion in the electrical circuit, or a failed transfer case control module.
Can I still drive my Ford with a P1859 code?
While you may be able to drive the vehicle, the 4WD system may not function correctly, which could be problematic in off-road or low-traction conditions.
How do I diagnose the P1859 code on my Ford?
Diagnosis typically involves inspecting the wiring and connectors for damage, testing the transfer case contact plate for continuity, and checking the transfer case control module for faults.
What tools are needed to troubleshoot a P1859 code?
You’ll need a scan tool to read and clear codes, a multimeter to test electrical circuits, and possibly wiring diagrams for your specific Ford model.
How is the P1859 code fixed on a Ford vehicle?
Repairs may include replacing the transfer case contact plate, repairing damaged wiring, cleaning corroded connectors, or replacing the transfer case control module.
How much does it cost to fix a P1859 code on a Ford?
Repair costs vary depending on the issue, but replacing the transfer case contact plate can range from $200 to $500, including parts and labor.
Can a P1859 code be triggered by a low battery voltage?
Yes, low battery voltage or poor electrical connections can sometimes cause this code, as the transfer case system relies on stable electrical input.
Will clearing the P1859 code solve the problem?
Clearing the code may temporarily reset the system, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for P1859 Ford OBDII Code
Code P1859 Ford comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
