Question

1999 Corolla Toyota with engine codes P0300, P0302, and P0303. What are the codes mean?

Answer 1

All the codes are for cylinder misfiring. You could start by checking or replacing the spark plugs. If the problem persists, the next step if to perform a compression test.

P0300 TOYOTA Code - Random Cylinder Misfire Condition
Read more: https://www.autocodes.com/p0300_toyota.html

P0302 TOYOTA Code - Cylinder 2 Misfire Detected
Read more: https://www.autocodes.com/p0302_toyota.html

P0303 TOYOTA Code - Cylinder 3 Misfire Detected
Read more: https://www.autocodes.com/p0303_toyota.html