I just had the check engine light come on while driving and my truck started sputtering. I pulled over and shut it off. Did a once over and eerything seemed fine. Drove off and it was fine. His the gas and it backfired a bit. Im reading its the O2 sensor. But is it the under the hood or in the exhaust ? My truck is a 2001 3.9

 

It's in the exhaust, before and after the cats. You can do the key dance to get the code to find out which one it is. Turn the ignition key from off to run and back to off 2 times. Then turn it from off to run a 3rd time and leave it in run and the code(s) will show up in the odometer window.

Jimmy

 

P0152 2/1 O2 sensor shorted to voltage.

It's in the exhaust, near the transmission pan, drivers side.

 

sorry I did not see the code in the first post. Been a long day here.

Jimmy

 

No problem Jimmy i feel ya there.
Okay so I would have to take my truck in to get it looked at? What would i have to replace?

 

Do it yourself. The lowers are easy to get to, getting to the connector is hard part.

 

he only has two .......lol theres one on top of the pipe on pass.side before the cat and one behind cat......easy 15min job if there not to tight if so pre soak with some lube.......ntk o2 sensors from napa 52.00 DONT use boush there no good .......good luck

 

He could have two or four O2 sensors. It all depends upon the emissions package, not the engine.

 

The code went away but when i get the chance i will head to Napa and get it replaced. And i think i only have 2 like Joker said. Thanks guys big help