Owners at Reddit's r/Honda ... position sensor, a bad variable cam solenoid, hairline cracks on the original-equipment roller rockers, and, as one 8thcivic commenter said, spun crank bearings.

One likely cause for the trouble, reports Honda, is a weak or intermittent input signal from the crankshaft position sensor to the PCM. Corrosion between the engine wiring harness and the sensor's ...