The Check Engine Light may illuminate due to a defective canister vent control valve in the emissions control system.
Car Problem Reports
Nissan Altima Check Engine Light due to faulty canister vent valve
Nissan Altima Problem
Average Mileage: 146,921 mi (120,000 mi - 173,843 mi)
Visitor, 1999 Nissan Altima, 173,843 mi
replaced vent valve and verified operation of new valve w 12v supply. Continue to get codes p0440 and p1448 after new valve installation. This has to be a Nissan evap electrical problem.
Visitor, 1999 Nissan Altima, 120,000 mi
valve apparently destroyed by rust