Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA20096 V6-3.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSFUEL TANK PRESSURE SENSORTESTING AND INSPECTION
2009 Mazda 6 V6-3.7L
Fuel Tank Pressure Sensor: Testing and Inspection
2009 Mazda 6 V6-3.7LSECTION Testing and Inspection
FUEL TANK PRESSURE SENSOR INSPECTION [MZI-3.7]
Voltage Inspection
1. Remove the evaporative hose component with the fuel tank pressure sensor connector still connected. Service and Repair
2. Switch the ignition to ON.
3. Plug one end of the evaporative hose component and verify that the output voltage from the fuel tank pressure sensor changes when pressure is applied from the other hose end.
- Fuel tank pressure sensor terminals A and B.
- If it cannot be verified even though the related harnesses have no malfunction, replace the evaporative hose component. Service and Repair
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.