Having driven approximately 400 miles in both city and highway conditions should have been enough to get the emission monitors to complete. At this point we have to recommend having a smog check repair specialist inspect your Honda Accord for proper emission sensor operation. Our assumption here is that there is emission data being received by the engine control unit (ECU) which is causing the incomplete monitor problem. The ECU is either not initiating the self-test sequence or not being able to complete it. A smog repair technician will need to diagnose the individual monitor system and ascertain why the monitor is having trouble becoming ready.
posted by SmogTips Support 07-17-2018 07:57 AM