Need to replace O2 sensor, where is it?

[dmcummins]

Ive got around 100k now on the old Boxster and I have a CEL. Code is P0134:
O2 sensor ahead of cat. conv. Cylinder (1-3).

I know there are 4 sensors, but I don't know which cylinders are (1-3), is this the passenger side or drivers side?

[bar10dah]

https://sites.google.com/site/mikefocke2/oxygensensors

[randy_k]

Here's another link as to the location. One of the easiest things you'll do.
Randy

Pelican Technical Article: Boxster Oxygen Sensor Replacement - 986 / 987

[dmcummins]

Thanks,

[paulv]

Originally Posted by dmcummins

Ive got around 100k now on the old Boxster and I have a CEL. Code is P0134:
O2 sensor ahead of cat. conv. Cylinder (1-3).

........

That code is for an interruption of signal from the O2 sensor to the DME, so check the wiring harness (signal and ground) also.

Regards,
paul...