Shut off while driving and will not restart, codes P0139 and P1147

DEEC

MEMBER
2004 NISSAN XTERRA
3.3L
V6
2WD
AUTOMATIC
180,000 MILES

I’m hoping someone can help me with this problem. Yesterday while driving, all of a sudden the car would not accelerate while driving (it rev’d when pressing the gas but would barely move and right after it just shut off and would not restart. It was trying to turn over, all lights, radio, etc. Came on so it’s not the battery. Once we towed it to our house It had kind of a fuel smell. We replaced the fuel filter. The fuel pump is working cause you can hear it. We have spark coming from the spark plug. The multi-meter didn’t show any problems but It’s pulling codes P0139 and P1147 on diagnostic reader. My question is this, everything I was reading said the rear heated o2 sensor 2 bank 1 would cause symptoms but still drivable. If this is true, then what would cause my car not to restart? After eliminating battery, fuel filter, fuel pump, spark to spark plugs, I’m at a loss. We only have the one vehicle at the moment so we desperately need to get it running ASAP and as inexpensive as possible. Thank you in advance for any advice, tips, etc. It’s greatly appreciated.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Welcome to 2CarPros.

Both codes relate to the same component. Under normal conditions, the heated oxygen sensor 2 is not used for engine control operation. With that in mind, I feel there is a different issue. I attached three pictures for you to help locate the sensor in question. I added them in case you want to replace it.

There is a diagnostic flow chart that correlates with both codes, but it is extensive and requires a specific type of scanner. Again, I don't think that is causing the no start, but I have been wrong before.

Another thing that can cause these codes is a engine vacuum leak. Since the engine isn't running, you will need to check to see if any vacuum hoses are disconnected or damaged. Also, a faulty fuel injector or fuel pressure which is out of spec can cause it. I realize you hear it run, but did you check to confirm the pressure is within the manufacturer's specs? If you smell gas, a faulty fuel pressure regulator could be allowing too much pressure to build and flooding the engine.

Do me a favor. This is an easy check for the fuel pressure issues. Remove the fuel pump fuse and see if it starts. If it doesn't, with the fuse out, see if it starts for a couple seconds with starting fluid and let me know the results. See picture 4 for fuse location.

Also, before this became an issue, was the engine running normally? Did you notice any power loss, rough running or idle, or anything else you could tell me?

If you can think of anything, let me know. Also, try the fuel test.

I will watch for your reply.

Joe

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