Nissan Repair: sensor ligths Nissan Pathfinder, crank angle sensor, oxygen sensors

Question
I wonder how to replace P1140, P1147 and P0158 P0138 (car needs two rear 02 sensors and timing sensor). I can't afford a price the dealer quoted me. The car seems to be doing ok except that the engine check light is on.
Thank you for your help.

Answer
Zachary,

courtesyparts.com is where you purchase the parts way less than the dealer cost.  The oxygen sensors require a 22 millimeter wrench or a oxygen sensor socket.  The crank angle sensor is pretty easy to replace.  I do not know what year yours is.  But, it is either on the timing cover or the distributor has to be replaced, depending on the year.  You could ask the guys at courtesyparts.com which you need.  Once the sensors are replaced disconnect the battery for five minutes to reset the code.