I had a P1170 for about a month (HO2S Bank 1 Sensor 1 Circuit Fixed ), and occasionally also P0134 - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 and P0140 - O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2. I hoped that the P0140 is also related to the first O2 sensor. So I replaced the pre-cat O2 sensor yesterday with a Bosch 13362. I clear the codes and went for a 1/2 hour drive. The codes didn't come back. But this morning the P1170 came back again! As far as I know the P1170 indicates a front O2 sensor circuit fault, so why is it still there after a new one was put in?
By the way the car is 96 with 1.5L.
By the way the car is 96 with 1.5L.
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