P0720 2001 Nissan Maxima

[Matt]

Whoa, slow down man.

Topic

[NissanMaxx]

Sorry for the long sentence i wanted to get all the details and i was sort of in a rush. I’ve only gotten one code for oxygen sensors but for some reason they appeared more than once when i checked them but they were both the same and the codes were P0140

[Matt]

How many miles are on the car?

[NissanMaxx]

The car has almost 97,000 miles on it and its a V6 but I’m pretty positive the cat is bad too i haven’t replaced it since i bought it

[EricTheCarGuy]

Would you mind posting the codes that you’re getting?

[NissanMaxx]

[quote]Quoted From EricTheCarGuy: _x000D_
_x000D_
Would you mind posting the codes that you’re getting?

[skim3544]

I have 99 Maxima and I can tell you that Nissan original cat would last much longer than 100K miles.

[NissanMaxx]

[quote]Quoted From skim3544: _x000D_
_x000D_
I have 99 Maxima and I can tell you that Nissan original cat would last much longer than 100K miles.

[skim3544]

His is how I would approach the problem – Check the O2 sensor connection – this is the one is located right after the cat.

[dreamer2355]

+1 with the above post as well as checking your power and grounds._x000D_
_x000D_
Keep us posted.

[NissanMaxx]

Ok well I checked the o2 Sensor and I tried to clean it, I checked the wiring and i put it back in, reset the code, and the same code came back up so i replaced the sensor. I reset the code again and now the same codes as last time are popping up. The onl

[NissanMaxx]

[quote]Quoted From skim3544: _x000D_
_x000D_
In my experience P:0420 usually is a bad O2 sensor, bad cat., O2 sensor connector problem (which can throw other codes), or big hole in the exhaust system. Since you already replaced the O2 sensor, I would say go a

[skim3544]

[quote]Quoted From NissanMaxx: _x000D_
_x000D_
Ok well I checked the o2 Sensor and I tried to clean it, I checked the wiring and i put it back in, reset the code, and the same code came back up so i replaced the sensor. I reset the code again and now the same

[EricTheCarGuy]

If you have a scanner that reads live data then you can look at the O2 readings while the engine is running.

[college man]

if the speed sensor is not working the car is probably cutting fuel_x000D_
back. that may have something to do with the cat code. I would_x000D_
concentrate on the speed sensor.

[NissanMaxx]

Quoted From college man: _x000D_
_x000D_
if the speed sensor is not working the car is probably cutting fuel_x000D_
back. that may have something to do with the cat code. I would_x000D_
concentrate on the speed sensor.

_x000D_
_x000D_
Ok, ill check the speed sensor fir

[Author]

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