Check Engine Light (2005 Liberty)

Discussion in 'General Motoring' started by jeffinputnam, Mar 8, 2009.

  1. jeffinputnam

    jeffinputnam Guest

    The Check Engine light came on about a 6 weeks ago with a 305 code. I
    brought it to the mechanic who played with it for a while and the light
    went out, apparently satisfied.

    Three weeks ago it came on again, same code.

    I had to wait a while to bring the truck back in and during that time it
    sat for two days without being driven. When I drove it again the light
    was out, yet came on a couple days later, same code. A week or so goes
    by, I fill the gas tank and when I started the truck the light was out
    and stayed out for a couple of days. It's on again now.

    I'm wondering why filling the gas tank or letting it sit for two days
    has to do with the problem. If the truck is misfiring on the 5th
    cylinder wouldn't the light just stay on until the problem was fixed?

    jeffinputnam, Mar 8, 2009
  2. A loose or bad gas cap will turn the light on.
    Pete E. Kruzer, Mar 8, 2009
  3. jeffinputnam

    Road Runner Guest

    A loose or bad gas cap will turn the light on.
    But it won't set a code P0305.
    Road Runner, Mar 8, 2009
  4. if i read it right that would be a p0305 misfire code code meanig
    cylinder#5 is having issues could be fouled plug or failed coil pac bad
    injector /bad injector wire,connector and if those check out good a full
    engine compression test would be in order to see if low compression is the
    root casue of that code setting when was the last time you had a full
    tune-up??? if you are do for one do not use bosch spark plugs they fail at
    a alarming rate
    man of machines, Mar 14, 2009
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