I have a1998 Altima. The service engine light came on. Had it diagnosed and received error codes P0440 and P1448. What are these and are they easy to fix?

Asked by Jan 19, 2013 at 11:47 AM about the 1998 Nissan Altima GLE

Question type: Maintenance & Repair

2 Answers


The P0440 code indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. The P1448 code indicates that the EVAP Canister Vent Control Valve is open. The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent. This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components. This solenoid valve is used only for diagnosis, and usually remains opened. When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows EVAP Control System (Small Leak)diagnosis

5 of 5 people found this helpful.

Good call on both the codes. I've seen P0440 a fair amount...a very general code something is wrong in the emission system. And I think the last time my '01 Frontier threw a service engine code it was for an open vent or valve somewhere in the emission system (not the engine). I think it might have been on the charcoal canister. I've heard on some Nissans, vents in the emissions system will stick open sometimes. That's what happened on mine. I reset the code (for what it's worth, I also unscrewed and re-tightened the gas cap) and drove it a while. The light has never come back on. If these are the only two codes, I don't think it would hurt to have someone reset them for you and drive it a while to see if they come back on (it's likely they're both for the same issue). If it doesn't you're fine. If it does, you'll have to replace something in the emission system (not certain what, though prob not the expensive catalytic converter). But it you want to reset the code and run the vehicle, it shouldn't hurt anything.

1 of 1 people found this helpful.

Your Answer

Nissan Altima Experts

  • #1
    Tom Demyan
  • #2
  • #3
    Cassie Sapphire
View All

Related Models For Sale

Used Nissan Maxima
217 Great Deals out of 17,895 listings starting at $1,995
Used Honda Accord
524 Great Deals out of 95,306 listings starting at $1,300
Used Toyota Camry
797 Great Deals out of 74,914 listings starting at $1,700
Used Honda Civic
356 Great Deals out of 53,229 listings starting at $1,200
Used Nissan Sentra
507 Great Deals out of 50,644 listings starting at $1,695
Used Chevrolet Malibu
616 Great Deals out of 48,807 listings starting at $1,800
Used Hyundai Sonata
396 Great Deals out of 50,628 listings starting at $500
Used Toyota Corolla
646 Great Deals out of 68,592 listings starting at $1,449
Used BMW 3 Series
935 Great Deals out of 33,171 listings starting at $1,000

Used Cars For Sale

2018 Nissan Altima For Sale
5 Great Deals out of 28,823 listings starting at $14,266
2017 Nissan Altima For Sale
136 Great Deals out of 10,379 listings starting at $10,690
2016 Nissan Altima For Sale
148 Great Deals out of 6,991 listings starting at $7,999
2015 Nissan Altima For Sale
263 Great Deals out of 9,435 listings starting at $5,999
2014 Nissan Altima For Sale
61 Great Deals out of 2,663 listings starting at $3,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.