Question

I have a 2003 Nissan Altima 4 Cyl. the following codes came up which are p1448, p0455, p0400. what are these codes?

Answer 1

Hi there,

The P0455 is an evap emissions gross leak. This code is caused by the P1448 which is for the vent control valve. This is bolted to the charcoal canister and usually the problem when you have these two codes together

The P0400 code is an egr code, normally due to either a split vacuum line or a plugged up egr tube from the exhaust manifold.

Answer 2

P1448 NISSAN - EVAP Canister Vent Control Valve Open
Read more: https://www.autocodes.com/p1448_nissan.html

P0455 NISSAN - EVAP Control System Gross Leak Detected
Read more: https://www.autocodes.com/p0455_nissan.html

P0400 NISSAN - Exhaust Gas Recirculation Function- No/Low Flow Detected
Read more: https://www.autocodes.com/p0400_nissan.html