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CHECK ENGINE LIGHT

isaacjose1isaacjose1 Member Posts: 2
edited February 2016 in Isuzu
THE CHECK ENGINE LIGHT IS COMING ON WHEN I CHECK THE OBD IT GIVE ME THE CODE P0300 AND P0402 WHAT IS THIS AND HOW CAN I FIX IT DO ANY ONE KNOWS

Comments

  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaMember Posts: 64,482
    Not a simple fix. These two codes in combination suggest (but only suggest) problems with the EGR system---that system has within itself various components, each of which could be malfunctioning (solenoid, EGR valve itself, or pressure differential sensor on some cars). So it needs professional diagnosis. If you want to take guesses, you can replace the EGR but that often doesn't fix this code .

    Sometimes faulty spark plugs and plug wires can throw the EGR code, so that's another area that needs diagnosis. Other possibilities include faulty MAF sensor, and a large vacuum leak.
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