Peter did I meet you at Wooders last week? Grab a Scan Gauge & it will give you instant feed back of anything the computer is reading & will read & clear fault codes as well
Lord Help Me I'm in to JEEP!
If you don't have access to a scan gauge, cycle the the ignition key from off to on 3 times and any codes will pop up in the odometer display. From there, google the codes or repost here and I'lll be able to tell you what they are.
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