2006 with P0420 & Three P3190 Errors - Toyota Prius Forum : Prius Online Toyota Forums
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Default 2006 with P0420 & Three P3190 Errors

My 2006 Engine Check light came on today.

Took it to Advanced Auto and found a P0420 Poor engine power and three P3190 Catalytic System inefficiency codes.

Started having trouble with mileage two months ago: normal of 53mpg in warm months (48mpg in winter). Had oil changed and tires replaced and started to get 46mpg in warm weather. I drive 40 miles round trip to work and mpg stays within 1 mpg day to day. The drop in mpg was immediately after the oil & tire change.

mpg went down yesterday on a 110 mile trip to 43mpg.

Started that same trip today and got gas. A few minutes after I got gas the Engine check came on.

Any ideas?
Greenbean950 is offline  

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