The Check Engine Light may illuminate after a cold start with an engine misfire code stored (P0300 - P0306). This condition can be caused by faulty valve lash adjuster and/or valve spring. Our technicians tell us that revised parts are available to correct this concern.
Check Engine Light With Engine Misfire Code (P0300-P0306)on Lexus IS250
Average mileage : 60,882 (9,558–134,000)
9 people reported this problem
4 people shared problem details
2013 Lexus IS25017,000Visitor
Intermittent cel, only code 0300' goes out on its own so far...
2010 Lexus IS2509,558Visitor
recieved p0300 check engine light mulitple cyclinder misfires car was brought into dealer 4 months after 4 year warrenty was up dealer was aware of this problem hapenning set me up with loaner car my is250 was fixed with 9 year warrenty on pistions rings p0300 codes all at no--charge
2007 Lexus IS250134,000Visitor
P0304 - changed spark plugs, did not solve problem. looking for further assistance...
2008 Lexus IS25033,500Visitor
check engine light is on code p0300 ,,p0304,p0305,p0306,dont know what to do,,,,, car runs fine