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RX - 2nd Gen (2004-2009) Discussion topics related to the 2004 -2009 RX330, RX350 and RX400H models

P0300 error code

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Old 10-13-20, 08:37 AM
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Dlogvine
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Default P0300 error code
On my wife's 2004 Lexus RX330 she had Check Engine light on. I checked the error code P0300 , cylinder (s) is misfiring or is randomly misfiring. The car runs smoothly even on idle so no cylinders are dead, but the error persists. Should i check the intake manifold gasket? could that be a faulty fuel injector or spark plug?
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Old 10-13-20, 08:32 PM
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iMSQ
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Clean the errors, have a drive, check for errors again.
What is the mileage? When were spark plugs replaced last time?
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Bogey2 (10-15-20)
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