Code P1133 [Archive] - GrandAmGT.com Forum

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Kyle
06-18-2009, 07:05 PM
The Definition is:

BBH02S-11 insufficient switching
Explanation
BBECM has detected the switch ratio of rich to lean lean to rich was below a determined number
Probable cause
BB1- Failed H02s11- heater circuit
BB2- H02s-11 signal shorted the ECM ground
BB3- Improper oxgen supply to sensor- Check sensor connector and wires

Does anyone know what sensor is causing this code?

Thanks.

Mike Jung
06-18-2009, 07:24 PM
http://www.canobd2.com/DtcLibrary/Default.aspx?Make=Pontiac&Dtc=%20P113

Code Make Description

P1133 Pontiac HO2S/O2S Insufficient Switching Sensor 1 Or Bank 1 Sensor 1

Sounds like the 02 sensor in the downpipe before the Cat.


Have a peek at this: http://www.gearchatter.com/viewpost12593.php

Kyle
06-18-2009, 07:44 PM
Thanks Alot!!

mfuller
06-18-2009, 08:04 PM
Also, you can check for a melted O2 sensor electrical harness.