We have a 2003 pathfinder that had an ECU code saying the driver's side front cat was bad. We replaced the catalytic converter and now the Inspection station says the ECU has a code for the Check Engine Light (CEL) not lighting up. The CEL does not come on at all. I thought it was simply a bulb or LED so I took the gauge cluster out and looked it over - there are no lights or LEDs to be found near the CEL. At least none that I can see without disassembling the cluster completely.
What are my options? Do we need to replace the ECU? Is this a common problem?
~Thanks