Where is Bank 1?

[gareth]

Hello All,

Recently I had P1128 / p1130 / p0455 - Researched it thoroughly, couldn't fix it myself / couldn't find an air leak after smoke test with local mechanic, etc - Decided to go to the local Porche garage where they hit me for $1000 - Fix included a new MAF, and they lifted up my fuel neck (as it had sunk etc) oh, & added a new gas cap ! ! ! However, this got rid of the codes for two days, until today, I drive solid for an hour, and suddenly get a code P1115 . . . . Renntech explains what it is (Thanks Loren), though does anyone believe I still have an air leak somewhere triggering this code, would this code be triggered by an air leak? Secondly, can someone show me where bank one is located via diagram, and a DIY perhaps? Do I need 2 sensors, or just the one, my local mechanic says I need two O2 sensors? Thanks Indeed everyone, I mean that.

[Loren]

P1115 Oxygen Sensor Heating Ahead of Catalytic Converter - Below Lower Limit

Potential causes:

- Heating current too low. - Contact resistance.

- Heating resistance too high.

- Open circuit in heating current circuits.

- Open circuit in H02S signal wire.

- Short to B+ (output stage cut off).

This code says you likely need 1 sensor - ahead of the cat.

[gareth]

Thanks indeed Loren! Any DIY on your site? Also, forgot to mention, it's a 99 996 with 69K on the clock.