I just bought a OBDII code reader. I received 3 codes off of my 97' Chevrolet truck computer: P0135,P0153 and P1133. I did an archive search of this site and I found that P1133 is probably a bad sensor in front of the catalytic converter. Are P0135 and P0153 also related to this same sensor problem? Thanks, Rick
Those are:
P0135 HO2S Heater Performance Bank 1 Sensor 1 P0153 HO2S Slow Response Bank 2 Sensor 1 P1133 HO2S Insufficient Switching Bank 1 Sensor 1
So it looks like you're showing problems on both oxygen sensors upstream of the converter (both banks). Could be they're both bad, or some kind of common connection problem or something..
Based on the codes, it looks like they're both degraded.
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