after the ,check engine light, came on it was pluged up to diostonic computer but the garage is not a isuzu dealer and had never seen a vcross before the code shows p1393 the vx is a japaneese inport 1997 right hand drive ,the engineer in garage suspected it is the mass flow sensor on the air intake or the oxygen sensor, the engine is v6 3.2 ive tryed scrapyards to get one but none about .do these go faulty is their something i can check air filter is good no drop in power ,or will i have to order a new one to plug it on to find it was the oxygen sensor after all any ideas???