Engine-Codes - Subaru - P0851 SUBARU

P0851 SUBARU - Park/Neutral Position Switch Circuit Low Voltage

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0851 SUBARU Possible Causes

  • Faulty Park/Neutral Switch
  • Park/Neutral Switch harness is open or shorted
  • Park/Neutral Switch circuit poor electrical connection

How is the P0851 SUBARU code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

There is a Factory Service Bulletin for the following Subaru models:
2005-2008 Subaru Legacy
2005-2008 Subaru Outback
2005-2008 Subaru Impreza
2005-2008 Subaru Forester
Subaru Factory Service Bulletin OBDII Code P0851

What is the cost to diagnose the P0851 SUBARU code

Labor: 1.0

The cost to diagnose the P0851 SUBARU code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0851 SUBARU Meaning

The engine control computer detects that the transmission is in the neutral state based on the signal from the Neutral Safety Switch (for Transmission M/T) or the neutral start switch assembly (for Transmission A/T).

Manual Transmission: The P0851 sets when shifting the gear position while driving the vehicle, the neutral position switch is left "Low".

Automatic Transmission: The P0851 sets when the range selector is in N or P range, the neutral switch is in P or N range and the range information from the transmission control computer indicates a position other than P or N. Also, when the range selector is neither in N nor P range, the neutral switch is in P or N range and the range information from the transmission control computer indicates a position other than P or N range

More Information

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