Ces Test Questions And Answers For Engine Management ((full)) Here

A stuck open VVT oil control valve (OCV) allows oil pressure to advance the cam even when not commanded. The PCM sees the discrepancy between target and actual angle. Cam sensor would cause correlation codes, not over-advance at idle. Timing chain slip would set correlation code with both cam and crank; low viscosity would cause slow response, not fixed over-advance.

A) Failed catalytic converter B) Aging upstream O2 sensor C) Exhaust leak before upstream sensor D) Rich fuel mixture ces test questions and answers for engine management

B) Vacuum leak

Which symptom most likely indicates a blocked filter-drier in a ship's refrigeration circuit? A) Hammering noise from the compressor. A stuck open VVT oil control valve (OCV)