OBD2 code P1133 02 sensor but which one

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09-28-2004, 08:56 PM

ArticZ

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OBD2 code P1133 02 sensor but which one

Well atleast I think its a 02 sensor P1133 says HO2S insufficient switching bank 1 sensor 1.. is there away to tell which sensor it is?

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09-28-2004, 10:16 PM

NicD

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bank 1 sensor 1 is the front driverside O2. That code means the O2 may be dying off or not getting hot enough.

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09-28-2004, 10:37 PM

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should I just change out the sensor then.. or what else can be done?

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09-29-2004, 12:31 AM

NicD

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Try swapping the two front sensors, clearing all codes, and see if the code follows it to bank 2 sensor 1. If so the O2 is dying and just needs to be replaced.

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