Pesky Check Engine Light

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Author Message   Jeremy Hamilton (Jeremy_hamilton) New Member Username: Jeremy_hamilton Post Number: 2 Registered: 05-2003 Posted on Tuesday, May 20, 2003 - 06:25 pm:    I've got a 96 D1. The check engine light always comes on at just about the same spot on my way home from work everyday. It's on sometimes and sometimes not. One thought I had is the gas cap or some other kind of fuel leak because I can smell gas outside the truck. Any other ideas besides a code reader? I just want to know if there's something simple I can check before I get too involved with it.   Corey (Discobro) Member Username: Discobro Post Number: 170 Registered: 12-2002 Posted on Tuesday, May 20, 2003 - 07:07 pm:    Sounds fishy... Usually the light will not go off unless the problem is gone. It could be a pressure problem with the gas line, but don't listen to me - I don't know anything.   Jeremy Hamilton (Jeremy_hamilton) New Member Username: Jeremy_hamilton Post Number: 3 Registered: 05-2003 Posted on Tuesday, May 20, 2003 - 07:49 pm:    You may be onto something, though. Whenever I fill the gas tank, sometimes pressure comes out when I take off the cap and sometimes it doesn't. I do believe it's correlated to the light being on, but I'm not positive as I just thought about it today.   Ron Johnson (Chauner) New Member Username: Chauner Post Number: 3 Registered: 05-2003 Posted on Tuesday, May 20, 2003 - 09:17 pm:    It can be the gas tank or a O2 sensor. Go to a mechanic that can access the codes, that should help.   Bill Howell (Billh13) Member Username: Billh13 Post Number: 56 Registered: 03-2003 Posted on Saturday, May 24, 2003 - 11:05 pm:    Just don't drive that way home. Go to Autozone they will read it for free.   Don E. Rayner (Derayner) New Member Username: Derayner Post Number: 5 Registered: 04-2003 Posted on Sunday, May 25, 2003 - 10:39 am:    Help with a 0300 code... random misfires.What could be the causes? oxy sens? If it is the oxy sens,which one?all four? Also, could the sensors have been damaged by a sticking valve causing gas to dump into exhaust?What else? Thanks for any help, Don   Don E. Rayner (Derayner) New Member Username: Derayner Post Number: 6 Registered: 04-2003 Posted on Sunday, May 25, 2003 - 10:42 am:    Some additional info,98 Disco 4.0 LE,Already changed plugs and wires(magnecor/NGK).Thanks, Don   Ron Brown (Ron) Senior Member Username: Ron Post Number: 369 Registered: 04-2001 Posted on Sunday, May 25, 2003 - 04:53 pm:    Valves Don Ron