2006 Mazda 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

DTC P0550: Notes

DTC P0550 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0550 PSP switch circuit malfunction
DETECTION CONDITION 
  • The PCM monitors the PSP switch signal, If the input voltage is low voltage (switch stays on) for 1 min. when the VSS is above 60.0 km/h {37.4 mph}  and the ECT is above 60°C {140°F}  , the PCM determines that the PSP switch circuit has a malfunction.

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE Is available if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTCs are stored in PCM memory.
POSSIBLE CAUSE 
  • PSP switch malfunction
  • Connector or terminal malfunction
  • Short to ground in the wiring harness between the PSP switch terminal and PCM terminal 1Z
  • Open circuit in the wiring harness between the PSP switch terminal and PCM terminal 1Z
  • PCM malfunction
G04324126Courtesy of MAZDA MOTORS CORP.
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