Possible causes
– Faulty Air fuel ratio (A/F) sensor 1 Bank 1
– Faulty Air fuel ratio (A/F) sensor 1 heater Bank 1
– Fuel pressure
– Faulty Fuel injector
– Faulty Air Flow Meter
– Faulty Air fuel ratio (A/F) sensor 1 heater Bank 1
– Fuel pressure
– Faulty Fuel injector
– Faulty Air Flow Meter
Tech description
If one or more sensors are replaced the Engine Control Module (ECM) Mixture Ratio Self-Learning clearing procedure must be perform.
There is a factory service bulletin for the following Nissan models:
Altima Sedan
Altima Coupe
Armada
Frontier
Cube
Maxima
Murano
Pathfinder
Quest
Rogue
Sentra
Titan
Versa
Xterra
Nissan Factory Service Bulletin OBDII Code P1284
When is the obd code mean?
The A/F signal computed by ECM from the A/F sensor 1 signal is shifted to the rich side for a specified period.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Possible rough engine idle
– Possible rough engine idle
P1284 NISSAN OBD Code Description
The Air Fuel Ratio (A/F) sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement