Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

O2 mV

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Old May 6, 2006 | 01:04 PM
  #1  
FastLt1's Avatar
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O2 mV

Left O2 mV always lower on start up in open loop. Only about .050 but it is constant. Any ideas?
Old May 6, 2006 | 05:17 PM
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Re: O2 mV

Originally Posted by FastLt1
Left O2 mV always lower on start up in open loop. Only about .050 but it is constant. Any ideas?
I wouldn't worry about it... But if you're into torturing yourself, pull both sensors and switch them- see if the difference is in sensors or engine banks.
Old May 7, 2006 | 02:38 PM
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Re: O2 mV

On cold start, both O2 sensors should read about 450mV. As the O2 sensors warm up (assuming you have the AIR pump) the voltage should drop to 0xxmV, and the PCM should kick into closed loop shortly thereafter.




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