Toyota Yaris OBDII P2420 code -possibble causes - Code PO441 is also thrown.Thank You

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anonymous · Answer 1 · 2017-03-19T18:03:35+0000

make sure your gas cap is on tight and if the seal is bad replace with the Factory gas cap

P0441 Lexus - EVAP System Incorrect Purge Flow

Possible causes

- Missing Fuel cap

- Incorrect fuel filler cap used

- Fuel filler cap remains open or fails to close

- Foreign matter caught in fuel filler cap

- Incorrect fuel tank vacuum relief valve

P2420 see below