On my 96 SSEi

it'* really sucking the gas as well

engine light came on steady not blinking.

Ran to the 'Zone' and they came up with code : P1133

so, where from here?

thanks...Todd

DTC P1133 HO2S Insufficient Switching Sensor 1

Sounds like you need a new O2 Sensor.

That sounds about right.

This all happened after the vacuum leak was found. It was running really lean and running really bad at idle.
Found out it was a vacuum line disconnected under the snoot of the SC'r

anyways I guess one thing after another now it'* running to rich?

huh

I'll have to bye a GM 02 sensor. Bank 1 *EDIT*

Thanks again...Todd

I didn't say rear?

The "1" in the code description usually means Bank 1, meaning the one in the exhaust manifold. The one behind the cat usually doesn't go bad, if it did, it would be "2".