Hey guys:
I recently got the P0138 and P0139 codes (bank 1 rear sensor). I think this happened at around the same time as when I performed a sea-foam clean on the motor. Anyhow, are the 4th and 5th gen oxygen sensors interchangable? The reason I ask is because I have a spare or two (used ones) from a 4th gen that I would like to just swap in. Also, are the the sensors interchangable with each other (i.e. swapping bank 1 with bank 2, rear with front)?

Thanks

 

On the 5.5gen, the rears are heated O2's (green) so they are different than the fronts (blue). That's all I know.

 

it appears on the 5.0 gen that they are all heated, though i am unsure of the color of each

 

they arent all heated on the 5th gen. only the rears are. its pretty simple to tell. heated O2s have 4 wires and non heateds have 3 wires. as to interchangeability...i dont know