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    Thread: O2 Sensor code - P0053 Heater resistance Bank 1 Sensor 1

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    1. 09-20-2016, 02:04 AM #12
      Enjoyneering
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      Hard to say is 8.5v OK or not. All I know it's not going to be 12v. Some voltage always drops on the transistor inside car's brain. It opens/closes frequently (pulse width modulation) and connects o2 to the ground. The ECU controls the o2 temperature by changing the width of the pulse.

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      Last edited by Enjoyneering; 09-20-2016 at 11:11 AM.
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