just a note in case anyone else has this problem - the oil pressure warning light on my 2012 1.8L Sonic came on as I stopped at a traffic light. Pulled over, shut it down and checked that oil level was OK. It was, and the light stayed off on startup, but came on again at next stop. My car is a manual, and I was able to keep the light off by holding the revs over 2000. (was only a block from home, so I drove it that way) Got it towed to the dealership, they replaced a faulty/leaking pressure sensor - as a bonus, got a free oil change. The loaner was a Sonic hatchback (mine's a sedan) - had some fun with the manu-matic, but glad I opted for the manual trans.