Why does engine sputter in your 2001 corolla?

Quite a few things could cause this to happen to the 2001 Corolla.

The engine could experience poor performance and sputtering due to: - dirty or clogged air filter - worn or mis-gapped spark plugs

• bad gasoline - gummed up throttle body - sensor malfunction (IAT

sensor, O2 sensor(s), MAF sensor) A dirty MAF sensor could cause sputtering in 2000+ Corollas. As these models are equipped with the 1ZZ-FE VVT-i engine (2ZZ-GE in the case of the Corolla XRS). Often overlooked, many can be carefully cleaned, instead of being replaced, and driveability often improves considerably.