DTC P0550:00 [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION & POSSIBLE CAUSES

DTC P0550:00	PSP switch circuit problem
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 km/h {37 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). The 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 The DTC is stored in the PCM memory.
POSSIBLE CAUSE	PSP switch connector or terminal malfunction PCM connector or terminal malfunction Short to ground in wiring harness between PSP switch terminal A and PCM terminal 2T Open circuit in wiring harness between PSP switch terminal A and PCM terminal 2T PSP switch malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P0550:00

PSP switch circuit problem

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 km/h {37 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).
The 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
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

PSP switch connector or terminal malfunction
PCM connector or terminal malfunction
Short to ground in wiring harness between PSP switch terminal A and PCM terminal 2T
Open circuit in wiring harness between PSP switch terminal A and PCM terminal 2T
PSP switch malfunction
PCM malfunction

Courtesy of MAZDA MOTORS CORP.