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

295

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 out of 2 people think this is helpful.
Best Answer
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.

4,785

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 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 1998 nissan altima PO 300 3 answers

    I have a 98 Nissan Altima that has intermittently give me a code PO300. I have replaced the plugs, wires, distributor and cap. Still has the same problem. Don't know where to go from here.

    1998 Nissan Altima GXE

    -

    Maintenance & Repair

  • 1103 trouble code service reminder or problem 1 answer

    about every other month check eng light comes on with code 1103 says to take to dealer

    1998 Nissan Altima XE

    -

    Maintenance & Repair

  • Nissan Altima throws code P 505 2 answers

    98 Altima had total engine rebuilt. Head was warped, machined smoothed, runs great. Now engine light on, throws code P 505 and needs Ca. smog cert. Tech said it will be about $400.00. He let me kn...

    1998 Nissan Altima GXE

    -

    Maintenance & Repair

  • Nissan Altima p0340

    After replacing my timing chain...Am having trouble getting my 2.5s nissan altima 2005 to spark. Is throwing code p0340 and I have replaced both camshaft and crankshaft position sensors any ideas ...

    2005 Nissan Altima 2.5 S

    -

    Maintenance & Repair

Altima

Looking for a Used Altima in your area?

CarGurus has 79,903 nationwide Altima listings starting at $2,000.

ZIP:

Search Nissan Altima Questions

Nissan Altima Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,980
#2 Cassie Sapphire
Cassie Sapphire
Reputation 650
#3 putolile
putolile
Reputation 620
View All

Related Models For Sale

Used Nissan Maxima
301 Great Deals out of 26,485 listings starting at $1,300
Used Honda Accord
786 Great Deals out of 87,768 listings starting at $1,150
Used Toyota Camry
849 Great Deals out of 90,626 listings starting at $850
Used Honda Civic
504 Great Deals out of 89,186 listings starting at $1,299
Used Nissan Sentra
436 Great Deals out of 56,435 listings starting at $1,400
Used Toyota Corolla
701 Great Deals out of 72,934 listings starting at $1,950
Used Hyundai Sonata
618 Great Deals out of 52,372 listings starting at $1,495
Used Chevrolet Malibu
862 Great Deals out of 81,264 listings starting at $995

Used Cars For Sale

2017 Nissan Altima For Sale
39,251 listings starting at $14,995
2016 Nissan Altima For Sale
90 Great Deals out of 9,171 listings starting at $11,499
2015 Nissan Altima For Sale
227 Great Deals out of 9,435 listings starting at $9,345
2014 Nissan Altima For Sale
256 Great Deals out of 7,728 listings starting at $4,900
2013 Nissan Altima For Sale
90 Great Deals out of 3,791 listings starting at $3,900