[SOLVED] P1858 Code: Fix Transmission Transfer Case Contact Plate ‘d’ Circuit Failure!

The automobile fault code P1858 indicates a problem with the Transfer Case Shift Motor.

The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

The cause of this fault code can be a faulty Transfer Case Shift Motor, an open or shorted harness, or a poor electrical connection in the motor circuit.

To fix this issue, it is recommended to visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this issue is estimated to be around 1.0 hour.

To interpret the fault code, check the “Possible Causes” listed above and perform the necessary inspections and repairs.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1858 fault code.

  • The symptoms of the automobile fault code p1858 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1858 can be caused by a faulty transfer case shift motor, an open or shorted harness, or a poor electrical connection in the circuit.

  • The fault code P1858 can be caused by the following: a faulty transfer case shift motor, an open or shorted harness for the transfer case shift motor, and a poor electrical connection in the transfer case shift motor circuit.

To fix the automobile fault code p1858, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1858, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p1858 are the estimated repair time of 1.0 hour and the typical hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P1858 fault code refers to a circuit failure in the Transmission Transfer Case Contact Plate ‘D’.

This code is set by the Transmission Control Module (TCM) when it detects that the contact plate is not functioning according to the factory specifications. The TCM monitors this component to ensure proper transmission operation. When the circuit fails, it can lead to issues with the transfer case and may affect the overall performance of the vehicle.

It is important to address this fault code promptly to prevent further damage and ensure smooth operation of the transmission system.

What are the possible causes for the automobile fault code p1858?

If you see the engine light or service engine soon warning light on, the fault code P1858 could be the culprit. This code is often caused by a faulty transfer case shift motor or issues with the motor’s wiring harness. To fix the problem, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Look out for broken, bent, pushed out, or corroded connector pins as well. It’s important to address these possible causes to resolve the issue.

How can I visually inspect the wiring harness and connectors to fix the issue?

To fix the issue of the Engine Light being ON or the Service Engine Soon Warning Light, start by visually inspecting the wiring harness and connectors. This can help identify any faults in the Transfer Case Shift Motor, such as an open or shorted harness or a poor electrical connection. Look for damaged components and check for broken, bent, pushed out, or corroded pins in the connectors. This thorough inspection will help pinpoint the problem and guide you towards the appropriate fix.

What should I look for when checking for damaged components or corroded connector pins?

When troubleshooting an engine light or service engine soon warning light, it’s important to check for damaged components and corroded connector pins. These issues can be the cause of a faulty transfer case shift motor or poor electrical connection in the motor circuit. To fix the problem, visually inspect the wiring harness and connectors, paying close attention to any signs of damage. Look for broken, bent, pushed out, or corroded pins on the connectors. This thorough inspection will help identify and resolve the issue effectively.

p1858 error fault code explained

If your engine light is on, it could be due to a faulty transfer case shift motor or issues with the motor’s harness and electrical connection. To fix this, visually inspect the wiring harness and connectors for any damage or corrosion.

Check for broken or bent pins as well.

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