Component Inspection

P0442 Evaporative Emission System-Leak detected (small leak)

Inspection/Repair - Component Inspection

Component Inspection

Fuel Tank Inspection
1. Check the hose connecting the fuel tank to the filler neck for cracks or fuel leakage.
And then, check tightening of the clamp band. (Fig.1)
2. Check the filler neck for cracks or fuel leakage. (Fig.2)
3. Check fuel tank for fuel leakage or any marks of impacts from the outside (Fig.3)
4. Check tightening of the hose band on evaporative gas line and O-ring status in the coupler (Fig.4)








Fig.1) Filler neck line
Fig.2) Filler neck line
Fig.3) Fuel tank
Fig.4) Evaporative gas line
5. Has a problem been found?





Fuel Pump & Vent Valve Seal Inspection
1. Check that the fuel pump is tight and properly installed. Check that Vent Valve flange is secure (Fig 1)
2. Check that the seal, installed on fuel pump and vent valve, is not missing, deformed or torn out (Fig 2)
3. Check that the flanges contacting the seals of both the fuel pump and vent valve are not deformed or torn. (Fig 3) & (Fig 4).








Fig.1) Fuel tank (Fuel pump)
Fig.2) Fuel pump
Fig.3) Fuel pump hole
Fig.4) Vent valve hole
4. Has a problem been found?





Vent Valve Inspection
1. Place the vent valve up and check that air can pass through the vent valve by blowing air into the port by mouth. (Fig.1)
2. Place the vent valve upside down and check that the amount of air is reduced or there is some feeling of resistance when blowing air into the port by mouth. (Fig.2)

NOTE:
Never inhale the air from the vent valve during the Vent Valve Inspection.




3. Has a problem been found?





Fuel Tank Cap Inspection
1. Check that correct fuel tank cap is installed.
2. Check that the contact surface between the filler neck and the fuel tank cap is correct.
- Fuel filler neck : Check the surface of the filler neck where the fuel tank cap seal contacts. (Fig.1)
- Fuel tank cap :
1 Check that seal on the cap is undamaged. (Fig.2)
2 Check operation of the pressure valve and vacuum valve in the fuel cap.




3. Has a problem been found?