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CEL codes 1133 & 1126
got these codes,
what should be my first step, change out bank 1 O2 sensor before C.Coverter?
P0133 Aging of Oxygen Sensor Ahead of Catalytic Converter (Cylinders 1 - 3) - Below Lower Limit
P1126 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Rich Threshold
01 Boxster S, 69,000 miles.
thanks for any help,
Scott
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