The Check Engine Light may illuminate with code P0138, P0140, P0158, and/or P0160 stored. Our technicians recommend replacing the rear oxygen sensor, and reprogramming the vehicle's powertrain control module (PCM) with upgraded software to correct this concern.
Resources for the Repair and Maintenance of your 2001 Infiniti QX4
2001 Infiniti QX4
2001 Infiniti QX4 Problems
The 4WD light may flash on and off intermittently with no transfer case related fault code stored in the powertrain control module (PCM). Our technicians recommend to ensure the correct Nissan/Infinity approved fluid is present in the transfer case if this condition occurs.
An abnormal noise may develop from the timing chain area, Our technicians tell us it may be necessary to replace the variable valve timing camshaft shaft sprockets to correct this concern.
The rear oxygen sensor may fail resulting in illumination of the Check Engine Light. Our technicians recommend to ensure the latest software is installed in the powertrain control module (PCM) along with replacing the failed O2 sensor.
2001 Infiniti QX4 Recalls (Recent)
Summary: VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES. SOME OF THE BRACKETS USED TO ATTACH THE TWO GAS STRUTS TO THE REAR DOOR (HATCH) MAY HAVE BEEN IMPROPERLY MADE. AT HIGH AMBIENT TEMPERATURES, THE INCREASE IN GAS PRESSURE IN THE STRUT(S) COULD CAUSE ONE OR BOTH BRACKETS TO BEND, RESULTING IN THE STRUTS DETACHING FROM THE BRACKET(S) WHEN OPENING OR CLOSING THE REAR DOOR.Learn more »
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES MAY HAVE AN IGNITION LOCK ASSEMBLY WITH IMPROPERLY SEATED KEY CYLINDER CAP CONNECTOR PINS. VIBRATION CAN CAUSE THE CONNECTING PINS TO LOOSEN AND/OR FALL OUT ALLOWING THE KEY CYLINDER CAP TO DISENGAGE FROM THE KEY CYLINDER.Learn more »
Summary: ON CERTAIN VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, DELAWARE, IOWA, ILLINOIS, INDIANA, KENTUCKY, MASSACHUSETTS, MAINE, MARYLAND, MICHIGAN, MINNESOTA, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, TENNESSEE, VERMONT, VIRGINIA, WEST VIRGINIA , WISCONSIN AND THE DISTRICT OF COLUMBIA, DURING THE COATING PROCESS OF THE FUEL FILLER TUBE ASSEMBLY, AN INSUFFICIENT AMOUNT OF COATING MAY HAVE BEEN APPLIED AT THE LOWER MOUNTING BRACKET. THIS COULD RESULT IN AN OPENING IN THE COATING WHICH CAN ALLOW WATER TO ENTER AND MAKE CONTACT WITH THE BARE METAL OF THE TUBE.Learn more »
RepairPal Expert Overview:
In areas where winter road salt is used, a mixture of snow/water and salt may enter an assembly location hole in the upper strut housing. This corrosive mixture can collect on the mating surface of the strut housing panel and the inner hood ledge assembly; over time, this can cause rusting of the strut tower housing. The rust can weaken the housing, causing it to crack and pull away from the inner hood ledge assembly. This can lead to grinding noises and increased steering effort, which, if severe enough, can cause the steering column to break. This would result in a loss of steering control, increasing the risk of a crash. Dealers will inspect the strut housing and repair the vehicles as necessary. An interim notification letter should be mailed to owners prior to May 16, 2011.
2001 Infiniti QX4 Questions and Answers
What type of transmission fluid does the QX4 require. Its low and I need to add.
My battery terminals were hooked up backwards. The 120 fuseablelink was blown. I replaced that and the car finally started but would only go 28 MPH tops. I had all other fuses checked and everythin...
I recently had to put a new timing kit in my 2001 QX4. We drove mabybe 20 miles and the check engine light came on. To make along story short we have had to replace the intake timing control valve ...
We recently had to put a new timing kit in our QX4. We had all gears , o-rings, etc replaced. When we got the vehicle back the engine light came on after driving for about 12 miles. The trouble cod...
2001 Infiniti QX4 Reviews
My QX4 Infinity has been giving me nothing but problem it's a 2001 the code pc160/code 300 multipy misfire 02 sensor / right cataylac converter.is this car worth the cost of repair?
i have an infinity qx4 2001 2wd, the speedometer dont go beyond 45 no matter how fast i go. I changed the instrument cluster and the speed sensor inside the transmission and it didnt work. I went to nissan dealership and they diagnosed the car and said the rare passenger speed sensor is bad.When i try to inquire from infinity dealership about the parts they told me the car does not have a speed sensor at the back that what it has was abs sensor and dont have anything to do with the speedometer. can someone tell me where the speed sensor is
i have a 01 QX4 and has been nothing but a problem.. I have replaced the radatior, therostat, spark plugs, coil pack, HID box, and my most recent incident is replacing the waterpump, it also needs front shocks. ive had acouple infiniti's and they were all great but this truck gives infiniti a bad name. i have only owned it for 6 months and all these problems!! On top of all that the dang thing has wiring issues the back window will open by itsself at times the radio will turn off by its self and when i roll up the windows sometimes it will roll up then right back down?
QX4 2001-2003 one car for history! infinit thanks for making this car! mine has 129000 and it is still running like new! my next one is going to be the new QX56 i will keep on buying infiniti all my life :)
Well, they don't make these any more...