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P0303 & P304 Code And Trac Lite Flashing

Springer

By Springer
in 01 - 06 Lexus IS300

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Springer

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Bought a 2003 Is300 a year ago and i've been having the same code reappearing since if i drive the car over 75 MPH. I've installed new plugs, swapped coils three times,swapped injectors from two different locations and resistence checks of all o2 fall within range. If anyone has any good thought on this I would be very interested. Also the car seems to run great weather the lights are on or off. Any thoughts!

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