badfish74

I'm getting a 0303 code from the ECU on my 96 max (auto). I know it's a o2 sensor and the decoder says "Left Front heated o2 sensor". Trying to search, I only come up with bank 1 & 2. Can someone tell me what bank is left or right. I guess the easiest way to determine this would be radiator or firewall.

Sorry if this has been asked a million times. I did try searching but couldn't find a direct answer.

TIA.

2brosgixxer

http://forums.maxima.org/6432120-post1.html

badfish74

Thanks! That clears things up.

DennisMik

iTrader: (2)

Front wheel drive cars confuse the definitions of left and right because the engine is mounted sideways. Then there are the multiple terms for the same thing.

Left side = bank 2 = firewall side.
Right side = bank 1 = radiator side.

Front sensor = sensor 1 = S1 = upstream sensor = sensor mounted in the exhaust manifold.

Rear sensor = sensor 2 = S2 = downstream sensor = sensor mounted in the exhaust y-pipe after the manifold (Cali spec) or after the main cat (Fed spec).