Do you still have a catalytic converter on your car? Yes, the O2 sensor is probably at fault here, but if you don't have a cat it might also be the cause.
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1999 Saab 9-3 5-door Stg4
Philly Region SCCA
Yes I have cat on my car, and I have checked every silikon house for leeks on the car, and have found no one, but I don't want to by new lamda if it's not the lamda who is broken, you get me?
The car works perfectly normal, I dont notis anything at all when I am driven, exept that its using VERY mutch Gasolin !!!!!! The drivingcomputer goes of the hills with the numbers.
It is possible that this code is indicating something else. Try to check the 02 sensor wires for continuity with a multimeter. Also I'd check the fuel pressure to see if it's low by any chance. That code can be triggered by that.
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1999 Saab 9-3 5-door Stg4
Philly Region SCCA
yeah, you need a gauge. There's a valve that you can attach a gauge to. The location varies, but it's either at the fuel rail or at the fuel pressure regulator.
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1999 Saab 9-3 5-door Stg4
Philly Region SCCA