Hello G users!
I'm long term user of BMW and Audis (own two of them now).
But from the beginning of its life - I'm in love with G35 Coupe! Bought week ago.






There are a few issues, in which I need your recommendations:

1. O2sensor heater circuit low on all four sensors (DTCs are P0031; 0051; 0037; 0057)

I guess there is fuse blown (which is responsible for all four O2 sensors)

Fuel consumption is toooooo high (22 lt/100km, or 10.7 mpg)

So where is located this O2 fuse? I couldn't find it written nowhere.



2. There is DTC stored (P0327) with Knock sensor 1 low circuit.

I guess it's probably dead sensor (but may be wire problem).

Is this common on VQ35 engine?

Thanks everybody in advance!

 

I see, there's no support

 

I don't believe their is a fuse for O2 sensors. The heater circuit is part of the sensor itself, O2 sensors are very lazy you may have to just replace them

 

I thought so, because it's very unlikely for all four sensors to die together but fuse(s) could.


I have found a resource for Infiniti OBDII codes and it states about fuse:

- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse

Read more: http://engine-codes.com/p0031_nissan.html#ixzz2OpbQ3pEp
Follow us: EngineCodes on Facebook

 

Oh, well then I stand corrected! Sorry

 

that's OK, I'm very new to Gs. Posted in electronics section to get answer from more advanced users, but no one knows...

 

Haha well have you tried googling a wiring diagram of that circuit? It's probably an inline fuse

 

I've just returned back from 'under the hood' inspection of fuses - everything was fine don't know where to search...

 

like i said, its probably inline fuse, which means it isnt under the hood. Is there a fuse panel inside the car? In the passenger seat area? Or be inline which means it isnt in the panel may be under the floor liner.

 

did you check the fuses and relays in the secret fuse box behind the battery?

 

1. I've checked in front of a battery. Everything was fine.

2. Found a closed box. What's that?





Where exactly is this box located (may be N2 on pic)?

 

I will check when i wake up. I just remember everything was wedged in so tight that I needed to remove the battery to reach it.

 

don't forget to check the panel by your clutch/dead pedal inside the cabin

 

Ah, it's early morning in the US

I'm just reading a manual:

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER (that's actually my errors)
2. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M72, F102
Fuse block (J/B) connector M4
15A fuse
Harness for open or short between heated oxygen sensor 2 and fuse

So, gonna find FUSE BLOCK - JUNCTION BOX (J/B) I guess

 

Finally, I have found!!!

It was one 15a fuse at the left of driver's feet!