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P0440 is a generic code for Evaporative Emissionm Control System Malfunction... pretty much for all makes. It takes 1 malfunction to create a pending DTC... at 2 consecutive malfunctions the MIL(Malfunction Indicator Light){Check Engine Light, etc.} Ok, after you fix it, it should take 3 trips to turn off the light, then 40 more to Remove the code from the computers memory.
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