Yeah so my check engine light decided to come on with the following trouble codes


p1148-closed loop bank 1

p1168-closed loop bank 2

p1031-Air/Fuel Ratio Sensor Meter

p1051-Air/Fuel Sensor Heater


Guys I'm completely clueless ..... I tried to read about the common problem and it seems that this stuff was written in Nissan language because I'm dumbfounded.....


Here is the link: http://www.nissanhelp.com/Ownership/.../NTB04-024.htm


I have an appt with the stealership tomorrow and I want to be prepared on what they "think" they are going to tell me.


ps: I didnt opt for the extended warrenty and now I'm paying for it


Any information would be GREATLY appreciated !!!!!


Thanks!

 

Seems pretty clear that you have a problem with one or more of your O2 sensor.

 

which is what I figured...... but I changed both o2 sensors before the cat last week and still come up with these codes...... so then im guess its the both after the cat?

 

Could be, but I would do some more research before you spend anymore money on O2 sensors. I don't have a service manual available for a 6th gen, but it should tell you based on your codes exactly what sensor is bad. You may also just have a wiring problem.

 

true that........ i ordered the CD version of the OEM repair manuel which actually came in today..... hopefully I can find out the problem and take care of it myself......



thanks for the input bro




-nate

 

Hmm, you can find it here too. But yes, seems as if 3 of your 4 O2 sensors are mad for some reason.

http://www.vq35de.com/ESM/Nissan/

 

sorry for the n00b question, but my engine light's been on for about a week and I was wondering how you get the code? Do you need a laptop and special software?

When I first start the car the AT light comes on for a second, then goes off so I am tending to thing it's related but...

Thanks

 

You need to get an obdII reader... buy it from pepboys/kragen/auto zone... think they are like 65-90 bucks if i remember right? guys?

OR you can bribe one of hte guys that work there into checking it for you, but pay him on the side... works here in cali ??? haha



Good luck friend..

 

P1148 - Bank one does not operate in closed loop
P1168 - bank 2 does not operate in closed loop

Both possible causes are harness and or connectors are shorted or open or a/f sensor or a/f heater is bad.

P1031 - A/F heater control circut too low.....current amperage in A/F heater is out of normal range. same possible causes as above.

P1051 - Same as P1031 except this is bank 2 P1031 is bank one

 

Go to Auto Zone. They will check it for you for free.

 

My OBD-II with software cost about $140.00

I'd also consider removing the positive battery terminal for about 30 minutes to clear the codes on your ECU. If you truly have a problem, the codes will come back!!!

 

Bizarre, as if the O2 sensors are not connected? Has the dealer found something? Bad ground? A melted wire that shorted the circuit?
Curious that both sensors and the MAF would stop working at the same time.