Auto Answers » View Question
beegee 1/18/2013
2006 Lexus IS250 Base 6Cyl2.5L - Engine
My check engine light and check vsc light on.
My check engine light and check vsc light on. No unusual driving changes noted.OBD scan shows PO0300 multiple random cylinder misfires detected.whats the cause? Spark plugs? Valves?
1 Answer
  • Jimm
    Jimm 1/18/2013
    Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
    Check also for any air leaks around the intake.

Preview Answer

AutoMD Verified Customer
AutoMD obtained proof this customer interacted with the shop.