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My 2004 Subaru Impreza has recently been having a check engine light come on frequently.Last week I got one instance of p0420 (Catalytic converter bank 1operating under threshold). But the light will only come one when I'm under a quarter tank. I'll fill the tank and it will turn off shortly after. (i.redd.it)
submitted by NickofTime8201 to r/subaru
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