Bank 1 / Bank 2

[Timco]

Are all vehicles the same? Bank 2 passenger side?

[particlewave]

When viewed from the rear, bank 1 is on the right side (passenger US).

[78F350]

Originally Posted by particlewave

When viewed from the rear, bank 1 is on the right side (passenger US).

Are you referring specifically to the Boxster? I've had cars where that wasn't the case.

[Gelbster]

This is why it is less confusing to use 4-5-6 or 1-2-3. The cylinder numbers are marked on the engine but are feint.For my rebuild I used a paint-pen to mark them on the crankcase and intake to void silly confusion when dealing with error codes.
Important with the M96 because of the 996/986 engine reorientation.

[particlewave]

Originally Posted by 78F350

Are you referring specifically to the Boxster? I've had cars where that wasn't the case.

Yes, for all 986's. I believe the 996 is the other way around.

[mikefocke]

Look at https://sites.google.com/site/mikefocke2/what-side-is-bank-1

[78F350]

Tim's original question asked about "all vehicles", so I didn't think he was just asking about our 986s. I have read and heard that bank one is the side that cylinder #1 is on and that cylinder #1 is the most forward (Forward being relative to the engine with output being at the back). I have read that there are exceptions, but I don't know of any. Was the term 'bank' even used before O2 sensors (fuel injection) was in use?

[Gelbster]

Good points.
It can be difficult to see which is the most forward cylinder and therefore easy to mistake 1 &4.Not a good mistake sometimes!.
Hence my paint pen suggestion. Helpfully the cylinder numbers are cast onto the cranckcase but are difficult to locate/see. Bright green paint pen solves that !

[Timco]

Sorry guys. I have a O2 sensor code on my F150. Bank 2 sensor 2.

There are sensors in the cats for each side but none downstream from that.

Here are the alternative facts....