CHECK ENGINE CODES PO440 AND PO446

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06-15-2006, 11:13 AM

pnamarble

Thread Starter

Join Date: Jun 2006

Posts: 2

CHECK ENGINE CODES PO440 AND PO446

KEEP GETTING THESE CODES WHAT IS CAUSING THIS NEED SOME ADVICE

06-16-2006, 05:42 AM

reiska

Join Date: Nov 2005

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Posts: 240

RE: CHECK ENGINE CODES PO440 AND PO446

- smbdy glued kb caps lock on?
- what kinda boat u have?
- if maxima, points to EVAP, find wassup via clicking top left 'Favorite Links', ...see link below

08-03-2018, 05:31 AM

diYdon2018

Junior Member

Join Date: Aug 2018

Posts: 1

P0440 = Evaporative emission control system small leak, negative pressure.
P0446 = Evaporative emission system vent control valve circuit.
Above is as per Haynes Manual for 2000 & 2001 Nissan Maximas. I've never had to deal with these codes so can't help you further. I hope this helps somewhat to narrow down the possible problem(s).