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Engine-Codes – Generic – P0855

P0855 Code - Drive Switch Input Circuit High

Quick Answer

The P0855 diagnostic trouble code indicates that there is a problem with the drive switch input circuit being too high. Common causes include Faulty drive switch, Wiring issues or shorts in the drive switch input circuit, Corrosion or damage to the connectors or terminals. 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
P0855 indicates Drive Switch Input Circuit High.
Common causes
Common causes include Faulty drive switch, Wiring issues or shorts in the drive switch input circuit, Corrosion or damage to the connectors or terminals.
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 07, 2024
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Code P0855 Description

The P0855 diagnostic trouble code indicates that there is a problem with the drive switch input circuit being too high. This code is typically found in vehicles with automatic transmissions, and it is related to the switch that allows the driver to select different driving modes such as park, reverse, neutral, drive, or manual shifting.

OBDII Code P0855 - Drive Switch Input Circuit High
P0855 Code - Drive Switch Input Circuit High

Common Causes of P0855

  1. Faulty drive switch
  2. Wiring issues or shorts in the drive switch input circuit
  3. Corrosion or damage to the connectors or terminals
  4. Issues with the ECU or transmission control module
  5. Electrical system malfunctions

Symptoms of P0855

  1. Transmission not shifting properly
  2. Check engine light illuminated on the dashboard
  3. Vehicle not starting
  4. Transmission stuck in one gear
  5. Loss of power or acceleration

How to Fix P0855

  1. Begin by using a diagnostic scanner to identify the exact cause of the P0855 code.
  2. Inspect the drive switch and wiring for any visible damage or corrosion.
  3. Test the drive switch input circuit for proper voltage and continuity.
  4. Replace the drive switch if it is found to be faulty.
  5. Clear the code from the ECU and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0855

The cost of repairing a P0855 code can vary depending on the make and model of the vehicle, as well as the specific cause of the issue. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost can be anywhere from $150 to $500. It is important to note that these are rough estimates, and actual costs may vary based on the factors mentioned earlier. It is recommended to get a detailed quote from a trusted auto repair shop before proceeding with the repair.

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Code P0855 Information for Specific Makes

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 P0855 Code

1. What does the OBDII code P0855 mean?

P0855 indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the drive switch input circuit, often related to the gear selector or transmission range switch.

2. What are the common symptoms of code P0855?

Symptoms may include the transmission not shifting properly, the gear indicator not displaying correctly, or the Check Engine Light being illuminated.

3. What causes the P0855 code to appear?

Common causes include a faulty drive switch, damaged wiring or connectors in the circuit, or a malfunctioning PCM.

4. How is the P0855 code diagnosed?

A mechanic will use a scan tool to monitor live data, inspect the drive switch, and check the wiring and connectors for damage or loose connections.

5. Can I drive my car with a P0855 code?

It’s possible to drive with this code, but it may cause shifting issues, which could lead to unsafe driving conditions or further damage to the transmission.

6. How do you fix the P0855 code?

Repairs may include replacing the drive switch, repairing or replacing damaged wiring or connectors, or reprogramming the PCM if necessary.

7. What tools are needed to troubleshoot the P0855 code?

A diagnostic scan tool, multimeter, and wiring diagram for the vehicle are typically used to identify the issue.

8. Will clearing the code fix the P0855 issue?

Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be resolved to prevent the code from returning.

9. How much does it cost to repair a P0855 code?

Repair costs vary depending on the cause, but replacing a drive switch typically costs $100-$300, plus labor, while wiring repairs may cost less.

10. Can a bad battery cause the P0855 code?

A weak or failing battery is unlikely to directly cause this code, but it can contribute to electrical issues that may affect the drive switch circuit.

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