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check engine light on but no code###

Discussion in '100-Series Cruisers' started by jersey1, Aug 15, 2005.

  1. jersey1

    jersey1

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    my 98 with 69000 miles has a check engine light that comes on and I have it checked out but no code came up. so the machanic reset and said i might need a tume up I changed the plugs and pcv valve but the light came back on about two weeks later. does anyone have any suggestion.....
     
  2. uzj100

    uzj100

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    Is the gas cap tight? Have you had any Throttle Body issues?

    I had a CEL come on and it was an O2 sensor. But there was a code.

    uzj100
     
  3. jersey1

    jersey1

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    thanks for the advise UZJ come to think about it I do think i have an after market gas cap. and could it also be some thing with my trottlebody cause there is a slite hesitating feeling when i go up a hill on the highway, it feels like the power comes and goes in and out. can't figure that one out. and i just canged my plugs and pcv valve but still the same thing....
     
  4. Melchor

    Melchor

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    Herro... at 69000 miles, it's most likely the O2 sensors. Have a real mechanic check all 4 sensors, and stop using cheap gas, or gas additives (after sensor replacement)