DTC P0843-00: Oil Pressure Switch No. 1 (Oil Pressure Switch B) Stuck Off: Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Oil pressure switch No. 1 is built into oil pressure switch B.
If there is a malfunction in oil pressure switch No. 1, replace oil pressure switch B.

DTC P0843:00	Oil pressure switch No. 1 (Oil pressure switch B) stuck off
DETECTION CONDITION	Under the following conditions, oil pressure switch No. 1 stuck-off detected by combination of gear ratio malfunction and oil pressure switch pattern malfunction: Engine is running. Battery voltage is 8 V or more . ATF temperature is 20 °C {68 °F} or more .
FAIL-SAFE FUNCTION	Inhibits malfunctioning gear. Limits engine torque. Inhibits learning control. Inhibits manual mode. Inhibits neutral idle control. Inhibits AAS.
POSSIBLE CAUSE	ATF is less than specified value Oil pressure switch No. 1 malfunction
SYSTEM WIRING DIAGRAM	-