I recently purchased a 2001 s60 t5 with a 5speed manual transmission. I recently noticed the car idling funny (revving between 500 and 1000 RPm's) Soon afterwards, the car died on a steep hill and would not start.

After about 20 minutes, I got it started again but it was still not idling correctly and the check engine light was on. I barely drove the car to a garage (kept stalling) and I had them read the error codes which were:

P0335: Crankshaft position sensor A circuit.
P0121: Throttle/Pedal position sensor/switch A circuit range/performance
p1238: cyl2-fueling circ. open circ.

After reading the codes and resetting the computer, the car was back to normal and drove perfectly.

I am not sure what the problem is or how to approach it.

Thanks