PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Normal o2 mv range?

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Old Jul 22, 2016 | 10:07 PM
  #21  
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Originally Posted by jimmyblue
The PCM will pin the O2 sensor voltage if it faults it.
See any O2 sensor related codes for that bank?
What "faults" would make the PCM pin the voltage?
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Old Jul 23, 2016 | 10:59 AM
  #22  
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What you quoted is an incorrect statement. The PCM doesn't 'pin' O2 sensor voltages with faults. There is a bias voltage the PCM applies on the PCM sensor input pin of 450mv that the sensor drives higher and lower when working. That is why when you unplug a sensor a scanner will show 450mv and not 0mv.
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Old Jun 13, 2019 | 09:29 PM
  #23  
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I know this is an old thread but did you ever figure out what the issue was? I am having the same exact issue. Thanks!
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