2003 Neon SE, no frills car.

Pulled into driveway last week, was missing a little bit.

Today would not start at all, Misfiring, light backfire, heavy fuel smell.

Codes:
442
456
300
302
522

Evap codes, misfire codes, low oil codes (oil in on min line on dipstick)

Did I drop my timing belt, maybe jumped a tooth on the pulley?

Thanks.. Gary

 

I got it to start. Shut it off and restarted hot and it was ok. I had disconnected the battery once and the codes were deleted, drove it one or two miles after warm up and got home, no codes. I have wondered if I have a head gasket problem because I am having some coolant / overheating issues. i understand that antifreeze can affect O2 sensors, Could the problem and codes above be connected to the head?
Thanks... gary

 

Oh my yes. You had me at overheat and coolent loss.

1) compression check

2) cyl leakdown check

Immediately. Do not drive this car until you do. You risk destroying the engine if it has a catastrophic failure.