Possible causes – Lack of intake air volume (block air filter)– Fuel injection system (Clogged fuel injector or bad fuel pump)– Faulty Engine Control Module (ECM) Tech description There is a factory service bulletin for the following Nissan models: 2007-2009 Nissan Versa 2007-2009 Nissan Versa Factory Service Bulletin OBDII Code P1421 When is the obd…