Well my ECU says it is Bank 2, sensor 1. That means the problem is coming from the passenger/right side of the car at the O2 sensor before the primary cat.
I guess I will check that connection or move the cable around.
Bank 2 Sensor 1 is actually the Drivers side ahead of the cat conv.....had the P0154 fault code last month and changed that O2 sensor myself ...easy to do ....and cleared all codes.
1999 Porsche 986 Boxster
'99 986 Baton Rouge, LA
Hybrid Mode
