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Author Topic: Oxygen Sensors  (Read 5963 times)
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fnorman
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« on: October 05, 2008, 04:13:41 pm »

 With ScanXL-ELM the O2 sensor screen under the diagnostics tab does not display any data. It will locate and identify sensors but no data. The O2 data does appear under the Data View tab. Why one place and not another??
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Brandon@PPE
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« Reply #1 on: October 06, 2008, 04:40:34 pm »

What specific data are you referring to? The values on the right panel in the O2 sensor tab are not available as PIDs, it is possible that your vehicle does not support reading this data. The values on the left should appear however.
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fnorman
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« Reply #2 on: October 07, 2008, 02:27:40 pm »

My 96 ford e150 van 5.8 does support the PIDs and the software finds and displays the )2 sensor data I'm referring to under the Data View tab. I am thinking I'm doing something wrong since the )2 sensor screen does not work. It finds and lists the sensors but displays no data.
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Brandon@PPE
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« Reply #3 on: October 07, 2008, 05:12:58 pm »

What specific piece of information do you see on the data view that you don't see on the Oxygen Sensor tab? If you vehicle does not support the specific information listed in the box on the right, this tab will only display which banks and sensors are present.
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fnorman
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« Reply #4 on: October 09, 2008, 10:08:46 am »

The data view shows O2 sensor voltgage, low, avg,  and high.  The O2 tab table has two lines for voltgage (blank) and rows for calculated O2 data. I don't have the ford enhanced program but this data seems basic and I 'think' it should show up in both windows??? I am using the latest download version.
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Brandon@PPE
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« Reply #5 on: October 10, 2008, 03:33:41 pm »

The PID values for low average and high voltage values are determined though entirely different ECU requests than those on the O2 sensor page. There is no correlation between the 2 pages. The O2 sensor page provides data supplied by special requests to the ECU that may or may not be supported. The O2 PIDs are completely different requests.
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fnorman
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« Reply #6 on: October 10, 2008, 06:59:01 pm »

Thanks, that info is good to know.
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jump89
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« Reply #7 on: October 21, 2008, 01:36:43 pm »

Trying to understand the 02 Sensor diagnostics.  On my 2000 Volvo the sensor test only shows voltage data for sensor 2 but nothing for sensor 1.  Only showing that sensor 1 is present.  No voltage data PID available for sensor 1 either.  What am I missing here ?
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Brandon@PPE
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« Reply #8 on: October 21, 2008, 04:34:24 pm »

That is interesting. Is this a European vehicle? If so, it may be that it is not fully OBD-II/EOBD compliant as this started in 2001 for European gasoline vehicles.

If you can provide us with a tech log it may be useful in determining why this may be happening.

Tech log:
Set the debug option to level 9.
"Help>Debug Options>Debug Level 9"
Try to connect, after failure, save the tech log.
"Help>Debug Options>Save Tech log"
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ICEp1ck
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« Reply #9 on: December 28, 2008, 04:24:33 pm »

I still dont quite understand the "Oxygen Sensors" screen either.

I ask it to read the 02 Sensor Test Results

Then on the left side of the screen it says "Oxygen Sensor Location" Present, Present, Not Present, etc...


But on the right side

I get no information in the table with all the Test ID's $01, $02, etc...



It's a Mercury 2003 Grand Marquis if that dictates anything.


Thanks for the clarification.
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Brandon@PPE
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« Reply #10 on: December 30, 2008, 03:30:01 pm »

The Oxygen Sensors screen uses two different systems for it's results.

One panel uses special requests to the ECU that may or may not supported (so you may or may not get any information from it) while the other side uses the parameters configured from the PID Config tab.
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