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DTC P0091:00: Notes

DTC P0091:00 (L3 WITH TC) DETECTION CONDITION & POSSIBLE CAUSES

DTC P0091:00 Fuel pressure regulator control circuit low input
DETECTION CONDITION 
  • When the PCM turns the spill valve control solenoid valve off but the spill valve control solenoid valve control circuit voltage is low for 5 s, the PCM determines that the spill valve control solenoid valve control circuit has a malfunction.

MONITORING CONDITIONS 
  • The following conditions are met:

  • Engine speed: 3, 000 rpm or less 
  • Battery voltage: 10 V or more 

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • High pressure fuel pump connector or terminals malfunction
  • Short to ground in wiring harness between the following terminals:
    • High pressure fuel pump terminal A-PCM terminal 2F
    • High pressure fuel pump terminal B-PCM terminal 2G
  • Spill valve control solenoid valve malfunction
  • PCM connector or terminals malfunction
  • Open circuit in wiring harness between the following terminals:
    • High pressure fuel pump terminal A-PCM terminal 2F
    • High pressure fuel pump terminal B-PCM terminal 2G
  • PCM malfunction
G06731611Courtesy of MAZDA MOTORS CORP.
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