Has anyone ever resolved "check engine light on, no codes" issues?
Have a 99 Cherokee 4.0 auto here that the check engine light keeps popping on at random. I tried plugs, wires, cap, rotor, and the tps but it still does it. Seems like every other day. There are no starting, running, or idling issues. No surging, no missing. I have scanned it with 2 different code scanners, tried the key on, push odometer button method and continues to read no codes. Also no pending or stored codes. I went as far as unplugging a spark plug wire to simulate a misfire just to see if there was something wrong with the obd2 connector but when the light popped on there was indeed a misfire code. So I just keep clearing the light each time it comes on. This is an issue now though as inspection is due this month. If the damn light is on it's not going to pass. One thing I have noticed though with either code scanner I am unable to establish a link with the engine running to pull live data... Every single thread I find through google leads to dead forum threads that were never resolved aside from one guy saying it was his evaporative purge solenoid. I'll try this also I guess... I don't know what to do next, find a new computer? I would think O2 sensors or coolant sensor would throw a related code.
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