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2001 Infiniti QX4 Question: I have a 2001 Infiniti QX4 that has had some problems and multiple codes read...



cloudyinAL, Andalusia, AL, July 26, 2012, 15:11

The main problem is lack of power and at one time it wold stall at a stop....Now it will not pass 3000rpm while driving. Recently had the Transmission flushed and did not help the problem. The codes i have been researching are: P0733, P1140, P0731, P0171, P0174...so far i have narrowed the codes to the mass air flow sensor, O2 sensor and could use some help with the others. Any help would be appreciated....

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  • Answer #1

    Greg's Orange Auto (15188 Answers) , Orange, CA - (714) 361-9386
    globalhelper July 26, 2012, 15:57

    po171 and po174 are lean bank 1 and 2 poss vac leak or mass air flow po731 and po733 are trans control module issues and p1140 is intake valve adv i rec having it ck'd by a pro these can be tricky

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    cloudyinAL, July 26, 2012, 15:58


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