P1560 – Application-Specific Fault Code (Nissan)

Description

P1560 is a manufacturer-specific Nissan fault code whose exact meaning can vary by vehicle, engine and control system. On some Nissan diesel applications, including YS23 engines, P1560 relates to the engine oil pump control valve circuit. Always confirm the Nissan-specific definition for the exact model and engine before diagnosing the fault or replacing components.

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Symptoms

  • Check Engine Light may be on
  • Oil-pressure or engine-management warnings may appear on applicable vehicles
  • Engine symptoms depend on the system using the P1560 code
  • Other related fault codes may also be stored
  • No obvious drivability symptoms may be present

Causes

  • Cause depends on the Nissan model and engine
  • Open or short circuit in the engine oil pump control valve wiring on applicable engines
  • Damaged or loose engine oil pump control valve connector
  • Faulty engine oil pump control valve on applicable engines
  • ECM circuit fault in rare cases
  • Other system-specific causes on Nissan applications where P1560 has a different definition

Diagnosis

  • Confirm the exact Nissan model, model year and engine
  • Check the manufacturer-specific definition of P1560 for that application
  • Read and record all stored and pending fault codes
  • Review freeze-frame data and related system faults
  • On YS23 applications, inspect the engine oil pump control valve connector and wiring
  • Check the control valve circuit for open, short-to-ground or short-to-power faults
  • Test the engine oil pump control valve according to Nissan specifications
  • Follow the Nissan-specific diagnostic procedure before replacing components

Repair

  • Repair damaged wiring, terminals or connectors
  • Repair open or short circuits confirmed during testing
  • Replace the engine oil pump control valve only if testing confirms it is faulty on applicable engines
  • Diagnose ECM faults only after the external circuit and control valve have been verified
  • Use the Nissan-specific repair procedure if P1560 has a different definition for the vehicle
  • Clear the code and confirm that P1560 does not return

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