Question about 2003 Jeep Wrangler

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Check Engine Light illuminated

2003 4.0 Jeep Wrangler Sport Check Engine Light illuminated and vehicle shut off but there was no noises coming from engine and wouldn not remain started. an hour later i started it and it runs but the check engin light is still on i do not have a scanner to check if there is a code being displayed i have good volts oil, coolant, and temp. what would be the most likly problem?

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The check engine light is most likely on due to an emissions system problem with the engine. This can result in obvious performance issues, but sometimes a vehicle will still seem to run fine, even with a problem. To continue to drive the vehicle could result in other problems, so: Most parts stores will scan for codes for free, explain what they mean, and give advice on how to fix the problem. You really need the codes to determine why the light is on, and why you are having problems with the jeep's performance. If you still have questions after getting the codes, post them here with further questions for help. Let me know how you make out.

Posted on Jun 14, 2009

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The most likely problem is the crank sensor , as far as check eng light find out what code it is that might help. Codes on little code readers are sometimes just a general discripition that could even lead you in the wrong direction. most of the time the fuel system does not trip the light. so rule that out for your question, not to many sensors will stop the motor that leaves the crank sensor which is a jeep night mare they always go out. it will be located in the top of the bell housing where the eng and trans go together. on the 6 cyl you can most of the time lean over the engine and see it. it will have one small bolt holding it in and then the little wire harness to unplug.

Posted on Jun 14, 2009


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