o2 sensor

  1. Thyme

    Upstream O2 Sensor Giving No/Bad reading to ECU

    Hey all, I'm having a real headscratcher of a problem with my Bank 2 Upstream O2 sensor. It failed on me out of the blue on a long trip across the country, or so the ECU claims. Its a Bosch O2 sensor, put in the car at the same time as the other functioning upstream O2 (also Bosch). When the...
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