P0871 Code - OD Pressure Switch Rationality Fault

What does P0871 Mean?

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.

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What are the common causes of P0871 ?

• Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
• Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
• Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

How do you troubleshoot P0871 ?

The most common repairs to address the P0871 code are as follows:

• Transmission high pressure pump repair or replacement
• Transmission temperature sensor replacement
• Replace or repair damaged or corroded wiring
• Powertrain control module repair or replacement
• Transmission fluid replacement
• Rebuild transmission

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