In NISSANS, a P0101 Code can be trigger by MAF Sensor Malfunction, Intake leak between the MAF and the Engine Intake or by the EVAP Control System Pressure Sensor malfunction.Sorry in advance for this long message:
Hello all, I am new to this forum. I have a 2nd gen 2012 SL AWD. I bought it with high mileage (267K km/166K miles) due to the freaking crazy high used SUV prices. It was driving ok but I wanted to perform maintenance like new iridium plugs cause I did not know when they were last changed. So I changed the plugs (Autolite), cam shaft sensors (OEM), filter, cleaned both sides of throttle body along with MAF sensor, changed PCV (it was stuck closed) and installed a new plenum gasket. I started to have the P0101 code after all this work. I investigated and found that I inadvertently broke one of the vac lines (dry). I then replaced all the 1/8" inner vac lines with silicone tubing. I cleared fault code and after 20k or so I had the issue again. So I researched then added cat cleaner to tank and ran this through. I ended up with 3 new faults relating to the throttle body and another sensor but these were pending codes. I decided to change the throttle body due to its age and gasket. I also purchased another MAF sensor. The 3 new fault codes cleared after many kilometers driving but the damn P0101 came back! I sealed any surface cracks on the air intake "accordion" tube as well. This car is in the shop now for new front stabilizer links and a new OEM crank shaft sensor. Any ideas would be helpful. I have seen a video on the P0101 code issue with a 2011 with an open wire to the MAF. I moved the wires around with engine running to see if the code came back.
Summery of what I have done so far:
Cam shaft sensors
Crank shaft sensor (today)
Duralube severe cat and exhaust cleaner
Assuming the Vac tubes and intake hoses to the intake plenum are not broken the MAF Sensor you installed is good and connected properly, you'll need to go under the vehicle and try a working EVAP Control System Pressure Sensor to see if the code goes away. That pressure sensor is located on the EVAP Cannister mounted under the body of the vehicle near the rear axle.
Hope that helps.