Check Engine Light

A forum for the legendary Nissan Pathfinder and Infiniti QX4.
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edogg27
Posts: 246
Joined: Fri Mar 25, 2011 9:13 pm
Car: 2003 Nissan Pathfinder

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My Check Engine light keeps coming on and it goes away sometimes and always comes back

car drives like it did when i got it just like new but i dont know what could be causing it

ik i have a valve cover leak or something of that nature i was told by the dealer would that cause it to send a code out


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Innovazn
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Joined: Sun Jan 17, 2010 2:55 pm
Car: Yellow 1998 Nissan R34 Skyline RB25DET 5 MT - Current

White 2012 Nissan Altima Coupe 3.5SR 6MT - Salvage (T-Boned at left turn)

White 2002 Nissan Pathfinder LE - SOLD (blew the engine)
Location: Burnaby B.C. Canada

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edogg27 wrote:My Check Engine light keeps coming on and it goes away sometimes and always comes back

car drives like it did when i got it just like new but i dont know what could be causing it

ik i have a valve cover leak or something of that nature i was told by the dealer would that cause it to send a code out

get the code pulled when the light goes off. then get back to us/search with code in hand. Sounds like cats are going or something but just check regardless. simply telling us the CEL is on is like telling us your fuel light came on or your turn signal went on when you pushed the hazards.


Edit :: Contrary to what Chuck said, when I said "when the light goes off" I meant it as when it goes on (sounding off etc..) Just "poor" choice of words
Last edited by Innovazn on Tue Jul 12, 2011 8:50 am, edited 1 time in total.

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Towncivilian
Posts: 4868
Joined: Sun May 23, 2010 10:21 am
Car: 2001.5 Nissan Pathfinder SE 3.5L 2WD A/T
2007 Nissan Altima 2.5L CVT
2012 Nissan Sentra 2.0L CVT Special
2012 Infiniti G37 Sedan 7A/T
Location: Florida, USA
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AutoZone will read codes for free. Just tell us the engine codes (e.g. P0303), don't buy any parts from them or anything just yet.

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Chuck Tribolet
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Joined: Mon Nov 24, 2008 3:15 pm
Car: '01 Nissan Pathfinder
'87 Chevy Corvette
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'98 Boston Whaler Montauk
Location: Morgan Hill, CA and Marina, CA
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Get the code pulled when the light is on, not when it goes out. And get the numeric code, not the so-called interpretation
of what means. The codes P1000 and up are manufacturer or even model unique, and the "interpretation" is sometimes
for a Ford or Chevy or Toy.

ARKQX33V6
Posts: 705
Joined: Fri Aug 06, 2010 3:35 pm

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On and then off is generally a not too important issue but that on/off cycle can hide 2nd out trips and these are saved within another memory and are possible to be hidden from that on/off MIL light.

I strongly urge you to get your own ODB II reader. You may not know what the codes mean but there are books, this site that indicates each code. But that knowledge is a double edged sword, because the fault always a code has more meaning. The best way to learn these codes and their meaning is by learning the operation of an internal combustion engine with its many systems that rely upon sequencing of each individually and in total.

If you feel that is too much then post your readings, someone will respond.

With cars of today and with Do it yourselfers, trying to save money, do it right and learn, there are a few diagnostic tools that help, that cost money and will save you grief. But you must learn how to use these tools safely and understand what they are telling you.

Besides hand tools, impact air tools, you will need a good not cheap multimeter. A good timing light. A vacuum and pressure gauge.

With this combination you are set to fix that vehicle but be sure to learn how to use these tools.

There are much more but starting off takes commitment money and time, lots of time.

GOOD LUCK!


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