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My po455-po457 came on changed fuel cap, same thing came back would it be the vent vale solenoid ? scan tool said large leak 0.90 HI
Vehicle: 2005 ford explorer 4.0

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Hi there,

It is quite possible the vent control valve is causing the issue. These tend to rust in an open position and fail that way. This would normally cause a large evap leak. You can remove it, then bench test it by adding power and ground to the solenoid. If you don't hear any clicking, then the solenoid is no good and should be replaced.

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