you can get the code manual by counting the blinks on the CE light but it's a limited code just tells you a generic problem but a scanner will tell you if the reading is higher or lower then expected ,no siginal, improper siginal. but cheep scanners are just that cheep they can only read very basic code OBD2 compliant ones but dealer level ones can also open close solenoids for evap test ,monitor voltage of sensor ,read freeze data of when the light came on and trouble started. read SRS ,ABS,TCS codes. as for the CYP problem check the sensor if replaced with new one, check wireing to the sensor to PCM is ok ,check the timing belt as if it's off a tooth it will throw codes like that and last item is a faulty PCM