Engine-Codes - Generic - P0871

P0871 - OD Pressure Switch Rationality Fault

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

P0871 Possible Causes

  • OD Pressure Switch harness is open or shorted
  • OD Pressure Switch circuit poor electrical connection
  • Faulty OD Pressure Switch
  • Internal transmission damage
  • Faulty Powertrain Control Module (PCM)
  • Faulty Transmission Control Module (TCM)

How is the P0871 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.

What is the cost to diagnose the P0871 code

Labor: 1.0

The cost to diagnose the P0871 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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When is the code detected?

This code is set if the OD pressure switch is open or closed at the wrong time in a given gear

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Transmission will not shift gears.

P0871 Meaning

The Powertrain Control Module (PCM) uses three pressure switches to monitor the fluid pressure in the LR, 2/4, and OD clutch circuits. The pressure switches are continuously monitored for the correct states in each gear.

More Information

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