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noisy o2 sensor waveform (Read 2,451 times)
caseprobe
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noisy o2 sensor waveform
May 30th, 2017 at 3:27am
 
recently checked  my o2 waveform on a Renault scenic 1.6 2001 and found this  unusual  capture.
Somebody on the pico forum pointed  out by zooming in  that the noise is not random,could the sensor cable be picking up signals from other cables in the wiring loom
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Tom Roberts
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Re: noisy o2 sensor waveform
Reply #1 - May 30th, 2017 at 10:17am
 

The tall shark fins in there are your coil events and the small ones are injection events.

The current for these often present in other inputs as visible voltage drops.
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Tom Roberts
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caseprobe
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Re: noisy o2 sensor waveform
Reply #2 - May 30th, 2017 at 2:16pm
 
So not an issue,I must admit its the first time Ive seen this scoping O2 sensor outputs   
many thanks
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