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My 04 titan is cutting out when I get on the gas. It will…

Customer Question
My 04 titan is...

My 04 titan is cutting out when I get on the gas. It will throw a code for my o2 sensor witch I replaced and it still showed it wasn’t working. It’s showing it’s stuck in close loop.

Mechanic's Assistant: Have you located all of the vehicle's oxygen sensors? Are the wires leading to and from each intact and in good shape?

Yes.

Mechanic's Assistant: Are you fixing your Titan yourself? What have you tried so far?

Yes, changed the sensor, cleaned the mfs sensor, swapped relays in the computer. Checked the injectors and coils.

Submitted: 19 days ago.Category: Nissan
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Customer reply replied 19 days ago
Sorry meant cleaned the MAF sensor when I did that it ran fine for 24 hours then threw the code for my O2 sensor again.
Answered in 1 hour by:
4/2/2018
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago
Jay
Jay, Nissan Technician
Category: Nissan
Satisfied Customers: 21,397
Experience: 20+yrs experience with Nissan & Infiniti Trained & Certified.Currently still working for Dealer
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Hello my name is ***** ***** thank you for your question.

What are the exact codes you are getting?

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Customer reply replied 19 days ago
Not sure off the top of my head. But I think I figured out the problem I unplugged my MAF sensor and my truck stayed running, so I would guess my MAF sensor is bad.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

If the truck stays running with the MAF sensor unplugged, it's very likely. The 02 sensor will cause the close loop code.

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Customer reply replied 19 days ago
I replaced the o2 sensor and and checked wires but it still throws the code. Would the MAF cause it to pop up?
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

What 02 sensor did you change and what is the code number?

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Customer reply replied 19 days ago
It was sensor 1 bank 2. Not sure on the codes a buddy checked them for me.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

What is the code number and where is the sensor located you replaced? Drivers side or Passenger side?

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Customer reply replied 19 days ago
Passenger side closest to motor. Waiting on mechanic to text back with codes.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Thank you. That is Bank 2. That is why you still have the code. Bank 1 is the drivers side.

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Customer reply replied 19 days ago
The MAF is why I still show the code? I replaced the sensor on bank 2 sensor and it still pops up closed loop bank 2.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Bank 2 is the passenger side. Bank 1 is the Drivers side. You have 4 02 sensors..

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Customer reply replied 19 days ago
Yeah it said it was bank 2 and I replaced sensor on passenger side. I think he said it was the air/fuel ratio sensor. That should of took the code away, but it didn’t.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Air Fuel Ratio Sensor is sensor 1 not sensor 2 and it's a different sensor.

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Customer reply replied 19 days ago
did I need to change the back one? It said air/fuel ratio sensor bank 2 sensor 1. So I changed the one on the passenger side closest to engine.
Customer reply replied 19 days ago
Witch is the one my mechanic told me to change.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Bank 2 Sensor one you get from the inner fender area.

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Customer reply replied 19 days ago
that’s the one I changed
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Did you clear the code after you were done?

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Customer reply replied 19 days ago
it popped as soon I started the truck. I think it was code P0051. I’m not positive on the code. Last night I cleaned my MAF sensor and it ran fine with for 24hours with no codes. then went back to doing it again. But like I said earlier if I unplug the maf sensor the truck stays running.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

How did you clear the codes?

Also what did you clean the MAF sensor with?

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Customer reply replied 19 days ago
MAF cleaner. My buddy cleared them with his computer.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Well if the truck does not run since cleaning the MAF sensor, but runs with it unplugged, that is a indication of a bad MAF sensor.

As for the Sensor, if you got the sensor after market, it may not work right. Would need to know the exact code you are getting to really help determine anything else with the A/F sensor

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Customer reply replied 19 days ago
I’m pretty sure it was p0051
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

K.. Hang on while I check that code..

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Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

P0051 is not a good code.

There is P0037, P0038, P0057, P0058. Those are the closest to that code.

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Customer reply replied 19 days ago
K I’m not sure then. I’ll message you back as soon as my mechanic gets back ahold of me. Thank you for your time. Out of curiosity would a bad MAF sensor cause that o2 sensor to run in a closed loop?
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

If it's after market I have seen it cause 02 sensors to flat line and have you replacing sensors you don't need to replace. You always want to stick with the dealer when it comes to electrical parts.

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Customer reply replied 19 days ago
I haven’t replaced the MAF sensor yet.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

Then I just advised you as to why you should replace it with one from the dealer.

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Customer reply replied 19 days ago
I reminder him showing me a graph with the truck running and said the o2 sensor should make it jump every 5-10 seconds but it wasn’t.
Customer reply replied 19 days ago
Would that be what you meant by flatlining
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

When you are reading the sensor as a Graph, A/F sensors read differently than a 02 sensor. The rear 02 sensor should be more or less a flat line with a blip in it ever once and a while

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Customer reply replied 19 days ago
K when I get ahold of him I’ll let you know more. Thanks for your time.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

You got it. Your welcome..

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Customer reply replied 19 days ago
The code was P1168.
Nissan Mechanic: Jay, Nissan Technician replied 19 days ago

That is the closeloop code for Bank 2 Sensor 1. So we are dealing with the Passenger upper A/F Sensor. Where did you buy the sensor you installed?

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