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Home >> Mazda >> 2020 >> CX-30 Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (3 Of 4) >> DTC P250A-00: Engine Oil Level Signal - Engine Oil Level Sensor Malfunction >> Function Inspection Using M-MDS
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Function Inspection Using M-MDS

DIAGNOSTIC PROCEDURE - FUNCTION INSPECTION USING M-MDS

Step Inspection Results Action
1 PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
  • Record the freeze frame data/snapshot data.
    NOTE:
    • Recording can be facilitated using the screen capture function of the PC.
- Go to the next step.
2 PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
  • Verify related Service Bulletins, on-line repair information, or Service Information availability.
  • Is any related Information available?
Yes Perform repair or diagnosis according to the available information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
  • Is the DTC P250A:00 on freeze frame data?
Yes Go to the next step.
No Go to the troubleshooting procedure for DTC on freeze frame data.
(See DTC TABLE (US) .)
4 PURPOSE: INSPECT FOR OTHER RELATED DTCs
  • Perform the DTC inspection for the PCM. (See DTC INSPECTION .)
  • Are any other DTCs displayed?
Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE (US) .)
No Go to the next step.
5 PURPOSE: DETERMINE IF CAUSE IS ERROR SIGNAL FROM ENGINE OIL LEVEL SENSOR
  • Clear the DTC recorded in the memory. (See CLEARING DTC .)
  • Access the following PIDs using the MMDS: (See PID/DATA MONITOR INSPECTION .) PCM:
    • ENG_OIL_TEMP
  • Start the engine and warm up until the value of PID ENG_OIL_TEMP is 60°C {140°F} or more.
  • After engine warm-up, perform the DTC inspection for the PCM. (See DTC INSPECTION .)
  • Is the same Pending DTC present?
Yes Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
No Go to the next step.
6 PURPOSE: VERIFY ACTUAL ENGINE OIL LEVEL
Yes Go to Step 8.
No Go to the next step.
7 PURPOSE: VERIFY IF CAUSE IS ENGINE OIL LEVEL SENSOR STICKING MALFUNCTION
  • Access the following PIDs using the MMDS: (See PID/DATA MONITOR INSPECTION .)

    PCM:

    • ENG_OIL_LVL
  • Start the engine while verifying the monitor value with the ignition switched ON (engine off).
  • Leave for 30 s or more.
  • Does the monitor value decrease by 7 mm {0.3 in} or more compared to the value with the ignition switched ON (engine off)?
Yes A temporary malfunction can be considered.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
8 PURPOSE: VERIFY IF CAUSE IS EXCESSIVE ENGINE OIL LEVEL
  • Switch the ignition ON (engine off).
  • Access the following PIDs using the MMDS: (See PID/DATA MONITOR INSPECTION .)

    PCM:

    • ENG_OIL_LVL
  • Verify the monitor value with the ignition switched ON (engine off).
  • Is the monitor value 74 mm {2.9 in} or more?
Yes Adjust the engine oil level near the middle of the upper and lower limit position on the dipstick.
(See ENGINE OIL LEVEL INSPECTION (VIN L) .)
(See ENGINE OIL LEVEL INSPECTION (VIN M) .)
Go to the next step.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
9 PURPOSE: VERIFY IF CAUSE IS ENGINE OIL LEVEL SENSOR STICKING MALFUNCTION
  • Access the following PIDs using the MMDS: (See PID/DATA MONITOR INSPECTION .)

    PCM:

    • ENG_OIL_LVL
  • Start the engine while verifying the monitor value with the ignition switched ON (engine off).
  • Leave for 30 s or more.
  • Does the monitor value decrease by 7 mm {0.3 in} or more compared to the value with the ignition switched ON (engine off)?
Yes The cause is an excessive engine oil amount exceeding the measurable range of the engine oil level sensor. Replace the engine oil because there is the possibility that the engine oil is diluted.
(See ENGINE OIL REPLACEMENT (VIN L) .)
(See ENGINE OIL REPLACEMENT (VIN M) .)
Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
No Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.