just got mine back...same problem for weeks no code.. It was the crank shaft position sensor.. completely failed-- car stalled like crazy and slipped cold or hot.... There is an open recall on this defective part. Dealer said my vin number did not make the recall. My mechanic said it was the part as it was the original part. It was change yesterday problem 100% resolved... Even if you dont have a code for this, this part may break either way.