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Home >> Mazda >> 2021 >> CX-5 Sport, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (On-Board Diagnostic - Engine Control (VIN Y) (3 Of 3)) >> DTC P250A-00: Engine Oil Level Signal: Engine Oil Level Sensor Malfunction >> Troubleshooting Diagnostic Procedure >> Intention of troubleshooting procedure

Intention of troubleshooting procedure

WARNING: This page is about a different variant/trim than selected.
TROUBLESHOOTING DIAGNOSTIC PROCEDURE

STEP INSPECTION RESULTS ACTION
1 PURPOSE: INSPECT ENGINE OIL LEVEL SENSOR CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the engine oil level sensor connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
 Yes Go to the next step.
No Repair or replace the connector and/or terminals, then go to Step 4.
2 PURPOSE: INSPECT ENGINE OIL LEVEL SENSOR CONTROL CIRCUIT FOR SHORT TO GROUND
  • Disconnect the PCM connector.
  • Verify that the engine oil level sensor and PCM connectors are disconnected.
  • Inspect for continuity between engine oil level sensor terminal C (wiring harness-side) and body ground.
  • Is there continuity?
 Yes Refer to the wiring diagram and verify whether or not there is a common connector between engine oil level sensor terminal C and PCM terminal 2BG.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has a short to ground.

Go to Step 4.
No Go to the next step.
3 INSPECT ENGINE OIL LEVEL SENSOR CIRCUIT FOR OPEN CIRCUIT
  • Verify that the engine oil level sensor and PCM connectors are disconnected.
  • Inspect for continuity between engine oil level sensor terminal C (wiring harness-side) and PCM terminal 2BG (wiring harness-side).
  • Is there continuity?
 Yes Replace the engine oil level sensor, then go to the next step.
(See ENGINE OIL LEVEL SENSOR REMOVAL/INSTALLATION [VIN Y] .)
No Refer to the wiring diagram and verify whether or not there is a common connector between engine oil level sensor terminal C and PCM terminal 2BG.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to the next step.
4 PURPOSE: PERFORM DTC INSPECTION AND VERIFY IF MALFUNCTIONING PART IS PCM Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
5 PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION
  • Is any other DTC or pending code stored?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No DTC troubleshooting completed.
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