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Code p1491 2001 infiniti qx4 what to fix

Changed coil. now getting p1491 code on 2001 infiniti qx4

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

hiseyj
  • 99 Answers

SOURCE: how many catalitic converters are on the 2001 infiniti QX4

There are only to Catalysts monitored by the ECM. There is a wide pipe near the front of the exhaust system that looks like it houses a catalyst, but it doesn't. Look for the rear O2 sensor, that is where the catalyst is. If the bolts that hold it on are not badly rusted, and depending on your mechanical aptitude you could replace them, otherwise take it to a shop. Have you checked the warranty coverage with the dealership?

Posted on Nov 26, 2008

  • 5 Answers

SOURCE: how much oil does the 1999 infiniti qx4 hold (when

5 quarts

Posted on Aug 06, 2009

  • 1 Answer

SOURCE: How to change Headlight HID bulbs in Infiniti QX4

It is really not that difficult for an 01 qx4, and if you order the bulb online you'll save enough money that if it takes you two or three tries (and bulbs) you'll still save over what the dealer or a mechanic would charge you:
Don't touch anything on the new bulb besides the plastic base (don't touch the glass!)
1. Make sure you disconnect the battery before anything else (you don't want to get shocked by these high voltage babies). If you're replacing the passenger side bulb, take the battery out for more room to work, especially to see what's going on in there (you can undo the air filter case on the drivers side for the same benefit, again--disconnect the battery first). 2. Find and unscrew the round, black, plastic lid behind the headlight, it's up and to the left. 3. You'll see a shiny metal connector with electrical warnings printed on it and Michael Jackson glove looking wiring attached to it. Turn that gently to the left to open up access to the actual bulb (you'll now see the bottom/back of the bulb--a black circle with a small metal tip in the middle). 4. Unhook the two metal braces that hold the bulb in place (push in gently to let wire out--kind of like unhooking a bungee cord or unsetting a mouse trap). 5. Pay attention how the two divots on the bulb case line up with the little nubs at the top of the encasing (you have to put the new one in lining up the same way.) 6. You can now take out the bulb. You might consider practicing the replacement sequence with your old bulb that you just took out before sticking the new one in there--just to get the hang of it so you aren't banging the new one around. 7. Once you've got the bulb back in there just put everything else back in place in reverse order. 8. Wash those dirty hands and try turning on your lights. 9. Go celebrate your automotive victory by driving somewhere at night!

Posted on Aug 28, 2009

  • 312 Answers

SOURCE: Pls where is Swirl Control Solenoid Valve located in Infiniti QX4

This link shows the location of the SCV, If your motor is different the location should be similiar. http://img510.imageshack.us/img510/5687/vacuumdiagramuh3.jpg

There's a vaccuum line that runs off the SCV to the SCV check switch.

P0442: Have you inspected the lines, charcoal cannister etc? Make sure the fuel cap is tight. The easiest way to check the system is to have someone perform a smoke test. I had a DTC on my car which indicated a EVAP problem, it turned out to be the Fuel tank evaporator Control Solenoid.

Posted on Sep 22, 2009

emissionwiz
  • 75066 Answers

SOURCE: do i have to pull off the intake to change the

YES IT IS Under the lower intake manifold... the entire manifold must be removed which is a 2.5hr job... and you will see it on the engine block itself

Posted on Nov 10, 2009

Testimonial: "thank you sir, very helpful"

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1 Answer

When I'm driving my qx4 infinity sometimes it


Spark Plugs are never an issue

They should be changed every 3 years
as preventative maintenance,not to fix
something,they wear,they don't fail to fire

Did you check for codes?

Could be any number of things,on different
systems

Need to have the car diagnosed

Jul 04, 2012 | Cars & Trucks

1 Answer

I have a 1999 qx4, I changed the knock sensor, cap, rotor, plugs and wires and while driving it starts to buck. There are no trouble codes


try changing the fuel filter if that doesnt work you might want to check the firing order, and the timing

Mar 13, 2010 | 1999 Infiniti.5 QX4

1 Answer

1998 infiniti qx4


shift solonoid b is in the transmission. not a do it
yourself situation. clear the codes and drive , see
if it comes back before you take it in for repair.

also check wiring going to trans. look for broken
wires and wires that are rubbed through

Nov 22, 2009 | 1999 Infiniti.5 QX4

1 Answer

I have a 1997 nissan quest and no I changed coil


I guess you have checked the sparkplug and power wires and they are ok. In that case the only thing left is the electronics module of the engine -  go to a repair shop and connect it to a tester, it's most likely fried . You can't fix that, replace it

Oct 31, 2009 | 1999 Infiniti.5 QX4

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