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Keith McMurphy Posted on Oct 31, 2013
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2003 Infiniti QX4 - Dies after starting. Check engine light on. O'Reilly's code scanner doesn't identify the specific sensor that is causing problem. Have performed 2 different "learn" sequences from on-line advice. Still have same problem. Any likely suggestions on which sensor it may be and the locations of them? I have checked all connections on the sensors that I believe to be associated like manifold pressure, etc.

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s_malko

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  • Posted on Oct 31, 2013
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Check the MAF sensor, after a few years those start to go bad. Throttle body may also need cleaning.

  • Keith McMurphy
    Keith McMurphy Nov 01, 2013

    Thanks for reply. Is that the manifold air flow sensor? I have checked that connection, before, but I didn't actually check the sensor. Is that possible with amp/ohm meter or should I just replace it? Sounds like a common problem and maybe replacement trial and error is reasonable method?

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3 Related Answers

Jonah Oneal

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  • Posted on Apr 25, 2009

SOURCE: were can i locate knock sensor on infiniti qx4

located on the bottom side of engine.

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Anonymous

  • 312 Answers
  • Posted on Sep 22, 2009

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.

Anonymous

  • 1 Answer
  • Posted on Nov 17, 2010

SOURCE: tryen to find location of the crank sensor on 1998 infiniti QX4

looking for crankshaft sensor on 1998 infiniti qx4

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