1998 Nissan Altima, Trouble code P0171, Ongoing problem

65

Asked by Nov 19, 2012 at 08:13 AM about the 1998 Nissan Altima GXE

Question type: Maintenance & Repair

As before the P0171 code keeps popping up, I changed the front Oxygen Sensor, Air Mass Mater, fuel filter & finally found the PCV valve, when I changed the PCV Valve the car ran much better and the code didn't come back up, but after a couple of days the car started running the same, poor rough idle, poor gas milage & and a gas/exhaust smell in the car. Could the PCV valve have clooged up so fast, possibly because of gunk in the line or where the valve plugs into?

3 Answers

355

how often do you change your Oil ? is there any Sludge in the Engine ? you may be looking at a lengthy overhaul of your engine internals if there is a Sludge buildup

2 people found this helpful.
Best Answer Mark helpful
65

There should not be any sludge in the engine, I or my son changes the oil once every 3 months and there is usually not 3,000 miles on it by that time, this engine was replaced about three years age because the timing chain broke and trashed the original engine, the replacement engine was used, about 68,000 miles on it, when installed, the oil was changed @ 1,000 miles then at a maxium of 3,000 there after, can't understand if the engine is sludged up, I'll take the PCV valve out again tonight to see if it'e clogged up, if it is, I guess there's a problem.

5,765

look vor vacuum leaks or intake or exhaust leaks. p0171 lean means theres too much oxygen and most likely is pulling air in at the intake manifold gasket or if you're smelling it inside car could be exhaust leak which may be sucking air in there causing the oxygen sensor to read too much oxygen and setting codes. so inspect intake and exhust for leaks.

1 people found this helpful.

Your Answer

Altima

Looking for a Used Altima in your area?

CarGurus has 70,156 nationwide Altima listings starting at $1,495.

ZIP:

Nissan Altima Experts

  • #1
    Tom Demyan
    Reputation
    2,450
  • #2
    F_O_R
    Reputation
    870
  • #3
    Cassie Sapphire
    Reputation
    770
View All

Related Models For Sale

Used Nissan Maxima
200 Great Deals out of 17,499 listings starting at $1,900
Used Honda Accord
424 Great Deals out of 101,059 listings starting at $1,200
Used Toyota Camry
761 Great Deals out of 70,900 listings starting at $1,200
Used Honda Civic
333 Great Deals out of 52,980 listings starting at $1,200
Used Nissan Sentra
457 Great Deals out of 50,801 listings starting at $1,795
Used Toyota Corolla
571 Great Deals out of 66,738 listings starting at $1,449
Used Hyundai Sonata
365 Great Deals out of 49,687 listings starting at $1,250
Used Chevrolet Malibu
480 Great Deals out of 49,315 listings starting at $2,000
Used Hyundai Elantra
423 Great Deals out of 48,041 listings starting at $1,995

Used Cars For Sale

2018 Nissan Altima For Sale
9 Great Deals out of 32,599 listings starting at $13,890
2017 Nissan Altima For Sale
129 Great Deals out of 9,238 listings starting at $10,950
2016 Nissan Altima For Sale
114 Great Deals out of 6,601 listings starting at $9,490
2015 Nissan Altima For Sale
245 Great Deals out of 9,513 listings starting at $5,999
2014 Nissan Altima For Sale
73 Great Deals out of 2,541 listings starting at $3,995

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.