P1133 trouble code

SOURCE: p1133 code

I have a 1998 Chevorlet Monte Carlo, and a I just got a p1133 code a week ago. I have my own diagnostics equipment, and the code is for "Oxygen sensor insufficient switching(upstream)"
I believe the codes are manufacturer specific so the code should be the same for all chevy's. The upstream oxygen sensor is located in the exhaust system before the catalyic converter. An ideal voltage for the sensor is .45v, but the sensor should switch between .1 and .9, when there is insufficient switching it causes the engine to run both too lean and too rich at times. Too lean could cause the engine to missfire and run rough. Hope this helps.

SOURCE: code p1133

GM p1133 = Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1
more than likely you have a bad oxygen sensor...the primary oxygen sensor in the exhaust BEFORE the catalytic converter.

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SOURCE: p1133 and p0134 code

Code P0134 is the #1 oxygen sensor on bank 1, up near exhaust manifold.
Code P1133 is insufficient switching of bank 1 02 sensor. Need to replace it.

SOURCE: code po300 comes on when you drive p1133,po171

code P0300 means random cylinder misfiring, have u checked spark plugs and cables

SOURCE: malibu 1999 p1133 code

p1133 is manufacturer control fuel air metering, this means that it is a bad 02 sensor. the primary oxygen sensor in the exhaust BEFORE the catalytic converter.