Details On DTCs

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC P250A:00 (PCM, SKYACTIV-G) DETECTION CONDITION AND POSSIBLE CAUSE

Description	Engine oil level signal: engine oil level sensor malfunction
Detection condition	Determination conditions	PCM receives abnormal signal from the engine oil level sensor.
	Preconditions	Battery voltage: 10-16 V¹ The following DTC is not detected: Communication error between engine oil level sensor and PCM: U1100:00 Low-G sensor (built-into Sophisticated Airbag Sensor (SAS) control module) signal is normal ^1 : Standard can be verified by displaying PIDs using M-MDS
	Drive cycle	1
	Self test type	CMDTC self test
	Sensor used	Engine oil level sensor Engine oil level sensor internal temperature sensor Low-G sensor (built-into Sophisticated Airbag Sensor (SAS) control module)
Fail-safe function	Not applicable
Vehicle status when DTCs are output	Not applicable
Possible cause	Excessive engine oil level (oil level exceeds measurable upper limit range of engine oil level sensor) Poor drainage during engine oil replacement Excessive engine oil resupplying Poor oil level adjustment Engine oil dilution NOTE: If a condition in which the engine oil temperature does not increase sufficiently is repeated, such as when driving short distances, the fuel does not vaporize, engine oil dilution continues, and then the oil level increases. Engine oil level sensor malfunction Clogging of oil passage to engine oil level sensor detection area Engine oil level sensor internal application specific integrated circuit malfunction Erratic signal to PCM Engine oil level sensor connector or terminals malfunction Short to ground in engine oil level sensor LIN communication line Open circuit in engine oil level sensor LIN communication line PCM malfunction
Courtesy of MAZDA MOTORS CORP.