1993 4runner code 25 intermittent trip

My 4runner trips occasionally on code 25. I have reset the ECM only to
have it trip 50 - 100km later. The first time it tripped was just after
I cleaned my K&N airfilter. It has tripped under acceleration and while
cruising on the hwy. I have tried fuel injector cleaner to no avail.
Any help would be appreciated.

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1 1st April 01:23 mike External User Posts: 1	1993 4runner code 25 intermittent trip My 4runner trips occasionally on code 25. I have reset the ECM only to have it trip 50 - 100km later. The first time it tripped was just after I cleaned my K&N airfilter. It has tripped under acceleration and while cruising on the hwy. I have tried fuel injector cleaner to no avail. Any help would be appreciated.