Normal cause if a failed egr valve.
change the egr valve
If it's a 2.4 L DOHC motor, there is no EGR valve.
P0403 Exhaust Gas Recirculation Circuit Malfunction Try cleaning the EGR Valve and see if that helps. If not, you may have to replace the EGR Valve. Also make sure all vacuum hose are connected and are not broken or have a leak.
between 250 and 400
Trouble code P0401 means: Exhaust Gas Recirculation Malfunction Replace the EGR Valve
how do u fix a gas needle on a 2004 nissan maxima
i have the code p0403 in nissan maxima 2000 i want to know how i can fix
misfire,monitor,malfunction
Usually you replace the egr valve.
The P0409 code indicates an exhaust gas recirculation (EGR) circuit malfunction. It could be a bad EGR valve, a bad EGR optical sensor, a bad powertrain control module (PCM), or a bad electronic control Module (ECM), also referred to as the engine control module.