P0871 Code - OD Pressure Switch Rationality Fault

Discussion in 'P - Powetrain Codes' started by fault code, Mar 28, 2018.

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    fault code Administrator Staff Member

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    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.
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    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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