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Misfire intermittent? how often and how rough? could it be one of the coils?
I got a M13 non VVT (in a swift but still same same) with this error code from time to time. tried cleaning it the o2 sensor but nah. changed a coil so doesn't run rough now. Did run very rough when the coil did act up, as in a severe loss of power.
swapped one of the coils for a used one helped so runs all ok now, but still the fault on the ECU comes back after 2-3 days. Will have to source a O2 sensor I guess. annoying that none of my 5-6 sensors on the shelves from various suzuki sources did not fit.
EDIT: Correction, my fault code does not say "no activity" just inefficient function or something like that.
No activity sounds like a broken wie or broken sensor.
