Trouble code P0420 means:Catalyst system efficiency below threshold
The 2002 Nissan Quest has a V6 engine.
The 2002 Nissan Maxima has a V6 engine.
The 2002 Nissan Frontier has an inline 4 engine.
The 2002 Nissan Xterra has an inline 4 engine.
The 2002 Nissan Sentra has an inline 4 engine.
The 2002 Nissan Altima has an inline 4 engine.
The 2002 Nissan Pathfinder has a V6 engine.
The 2002 Nissan Maxima has a 3.5 L base engine size.
The 2002 Nissan Sentra has a 1.8 L base engine size.
The 2002 Nissan Xterra has a 2.4 L base engine size.
The 2002 Nissan Pathfinder has a 3.5 L base engine size.
The 2002 Nissan Quest has a 3.3 L base engine size.