AutoCodes – Generic – P1855

P1855 Code - Transmission Transfer Case Contact Plate 'C' Open Circuit

Quick Answer

The Transmission Control Module (TCM) monitors the Transmission Transfer Case Contact Plate 'C. 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: P1855 indicates Transmission Transfer Case Contact Plate 'C' 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.

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Code Popularity 27,456

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 Jan 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1855 Description

The Transmission Control Module (TCM) monitors the Transmission Transfer Case Contact Plate 'C. The TCM sets the OBDII code when the Transmission Transfer Case Contact Plate 'C is not to factory specifications.

OBDII Code P1855 - Transmission Transfer Case Contact Plate 'C' Open Circuit - AutoCodes.com — P1855 Code - Transmission Transfer Case Contact Plate 'C' Open Circuit

What does this mean?

What are the Possible Causes of the DTC P1855?

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 P1855?

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 P1855 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 P1855 code?

Need more information on how to fix the P1855 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1855 Ford — Transmission Transfer Case Contact Plate 'C' Open Circuit
P1855 Mitsubishi — Shift Fork 3 Or 4 Opposite Direction Movement

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.