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Home >> Mazda >> 2017 >> CX-3 Touring, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System (2 Of 5) >> DTC P0451-00; Fuel Tank Pressure Sensor Sensor Characteristic Malfunction >> Function Inspection Using M-MDS
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Function Inspection Using M-MDS

STEP INSPECTION RESULTS ACTION
1 PURPOSE: VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
2 PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
NOTE:
  • Recording can be facilitated using the screen capture function of the PC.
  • Record the FREEZE FRAME DATA/snapshot data on the repair order.
- Go to the next step.
3 PURPOSE: VERIFY IF FUEL TANK PRESSURE SENSOR HAS MALFUNCTION Yes The possibility of a fuel tank pressure sensor malfunction is high.
No Go to the next step.
4 PURPOSE: INSPECTION OF CLOGGING BETWEEN FUEL TANK PRESSURE SENSOR AND FUEL TANK Yes The possibility of clogging between fuel tank pressure sensor and fuel tank is high.
No Go to the next step.
5 PURPOSE: VERIFY IF CV SOLENOID VALVE HAS MALFUNCTION Yes The possibility of a CV solenoid valve malfunction is high.
No Go to the next step.
6 PURPOSE: VERIFY IF FUEL TANK PRESSURE IS STUCK TO EITHER LOW OR HIGH PRESSURE SIDE Yes The possibility that the fuel tank pressure is stuck to the high pressure side is high.
  • Go to the next step.
No The possibility that the fuel tank pressure is stuck to the low pressure side is high.
  • Go to the troubleshooting procedure to perform the procedure from Step 3.
7 PURPOSE: VERIFY IF MALFUNCTION CAUSE IS FREEZING OF FUEL TANK PRESSURE SENSOR BY VERIFYING AMBIENT TEMPERATURE Yes The possibility of a malfunction caused by freezing of the fuel tank pressure sensor is high.
  • Go to the troubleshooting procedure to perform the procedure from Step 1.
No Go to the troubleshooting procedure to perform the procedure from Step 2.