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ECU Reading
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l_green Offline
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Post: #1
Big Grin ECU Reading
Below is data from my ECU.

Does the O2 sensor behave like a narrow band sensor or and afr?

Thanks for your help.

Code:
Absolute    Load    O2 Sensor                
Throttle    Percent    Voltage                                                
12.2%    28%    0.155                                                
20.8%    44%    0.585                                                
24.3%    52%    0.490                                                
24.3%    59%    0.195                                                
24.7%    56%    0.390                                                
24.3%    62%    0.725                                                
23.1%    60%    0.780                                                
17.3%    47%    0.175                                                
17.6%    39%    0.075                                                
13.3%    43%    0.055                                                
16.1%    21%    0.745                                                
19.6%    30%    0.745                                                
12.6%    44%    0.035                                                
12.2%    24%    0.075                                                
18.0%    27%    0.175                                    
20.0%    49%    0.760                                    
20.8%    74%    0.195                                    
19.2%    71%    0.745                                    
18.4%    66%    0.725                                    
14.1%    54%    0.760                                    
20.0%    29%    0.035                                    
18.4%    69%    0.820                                    
17.6%    49%    0.820                                    
13.7%    44%    0.055                                    
15.7%    36%    0.780                                    
12.2%    33%    0.095                                    
12.2%    24%    0.820                                    
12.2%    29%    0.745                                    
12.2%    38%    0.745                                    
12.2%    44%    0.350                                    
12.2%    45%    0.565                                    
12.2%    43%    0.270                                    
12.2%    43%    0.705                                    
12.2%    45%    0.760                                    
12.2%    44%    0.135                                    
12.2%    44%    0.115                                    
12.2%    44%    0.115                                    
12.2%    44%    0.625                                    
12.2%    43%    0.725                                    
12.2%    43%    0.705                                    
12.2%    42%    0.760                                    
17.6%    51%    0.075                                    
14.5%    53%    0.115                                    
18.4%    39%    0.310                                    
19.2%    48%    0.645                                    
21.2%    50%    0.095                                    
18.8%    53%    0.780                                    
21.2%    49%    0.800                                    
12.2%    56%    0.035                                    
12.2%    27%    0.840                                    
12.2%    39%    0.545                                    
12.2%    34%    0.075                                    
12.2%    35%    0.055                                    
12.2%    43%    0.605                                    
12.2%    44%    0.075                                    
16.5%    60%    0.035                                    
12.2%    47%    0.725                                    
12.2%    28%    0.745                                    
12.2%    45%    0.215                                    
12.2%    45%    0.055                                    
12.2%    43%    0.075                                    
16.1%    45%    0.820                                    
17.6%    51%    0.760                                    
19.2%    48%    0.685                                    
18.8%    54%    0.250                                    
20.8%    49%    0.605                                    
21.6%    57%    0.505                                    
15.7%    63%    0.625                                    
12.2%    26%    0.055                                    
12.2%    20%    0.075                                    
20.4%    44%    0.035                                    
20.8%    60%    0.760                                    
25.1%    66%    0.760                                    
18.8%    69%    0.820                                    
18.8%    46%    0.705                                    
18.0%    40%    0.055                                    
13.3%    33%    0.075                                    
13.3%    21%    0.470                                    
16.5%    31%    0.035                                    
15.7%    26%    0.725                                    
15.3%    25%    0.705                                    
16.5%    24%    0.800                                    
17.6%    36%    0.745                                    
16.9%    33%    0.725                                    
16.9%    40%    0.705                                    
16.1%    39%    0.505                                    
17.3%    33%    0.055                                    
21.6%    37%    0.745                                    
25.9%    64%    0.705                                    
31.8%    85%    0.115                                    
32.6%    88%    0.760                                    
31.0%    88%    0.665                                    
23.5%    65%    0.745                                    
14.5%    49%    0.055                                    
18.0%    24%    0.780                                    
23.5%    44%    0.135                                    
35.7%    62%    0.760                                    
43.1%    92%    0.705                                    
43.1%    85%    0.645                                    
25.5%    83%    0.725                                    
22.7%    55%    0.075                                    
19.6%    50%    0.705                                    
18.8%    36%    0.545                                    
16.9%    40%    0.645                                    
12.2%    23%    0.745                                    
12.2%    18%    0.780                                    
14.1%    18%    0.780                                    
28.2%    31%    0.490                                    
26.7%    67%    0.725                                    
23.9%    58%    0.625                                    
31.0%    59%    0.645                                    
32.9%    84%    0.250                                    
16.1%    87%    0.780                                    
14.5%    20%    0.760                                    
14.1%    19%    0.820                                    
14.1%    20%    0.745                                    
14.1%    20%    0.490                                    
14.5%    20%    0.625                                    
16.9%    24%    0.215                                    
18.8%    28%    0.760                                    
19.6%    40%    0.545                                    
19.6%    45%    0.745                                    
19.2%    45%    0.745                                    
19.2%    39%    0.745                                    
19.2%    43%    0.450
09-24-2008 08:52 AM
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JonnyBravo Offline
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Post: #2
RE: ECU Reading
Appears to be a narrowband - narrowband 02 sensors fluctuate between 0.2 and 0.9 volts, and according to your chart, that's exactly what you're getting.

'94 Ford Explorer 4.0L - Fargo, ND
09-24-2008 10:10 AM
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hydrotinkerer Offline
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Post: #3
RE: ECU Reading
What kind of vehicle did these numbers come off of?
09-24-2008 10:22 AM
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l_green Offline
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Post: #4
RE: ECU Reading
hydrotinkerer Wrote:What kind of vehicle did these numbers come off of?

This is the reading from a 2006 Chrysler Pacifica 3.5L V6 engine.

The Automotive Hobbyist schematic shows the four wire sensor. It is labeled 'Oxygen Sensor'.

Thanks

Luskey
09-24-2008 10:37 AM
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l_green Offline
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Post: #5
RE: ECU Reading
JonnyBravo Wrote:Appears to be a narrowband - narrowband 02 sensors fluctuate between 0.2 and 0.9 volts, and according to your chart, that's exactly what you're getting.

There are at least 30 readings below the 0.2 volt parameter. Does this 'widen' the range and indicate a wide band type of sensor?
09-24-2008 11:00 AM
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colchiro Offline
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Post: #6
RE: ECU Reading
A wide band sensor has a voltage closer to 2 to 3.5 VDC.

I didn't see any readings close to that.

Rick

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09-24-2008 03:56 PM
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cmac0351 Offline
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Post: #7
RE: ECU Reading
What did you use to get those readings? I have been wanting to actually see the o2 voltage in response to adding HHO. If it is causing the computer to go rich, those readings should be lower when HHO is added, right?
09-25-2008 04:43 PM
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l_green Offline
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Post: #8
RE: ECU Reading
cmac0351 Wrote:What did you use to get those readings? I have been wanting to actually see the o2 voltage in response to adding HHO. If it is causing the computer to go rich, those readings should be lower when HHO is added, right?

I used an ELM 327 scantool.

These reading were without HHO gas.

Here is my problem:

Fact: we are told that narrow band sensors flucuate between .1 to 1 volt DCV.

Fact: we are told that if adhol.com schematics label the o2 sensor as 'Oxygen Sensor' it is narrow band.

Fact: these reading are taken directly from the ECU not a volt meter and flucuate between .01 to 1 volts.

Fact: the adhol.com schematic labels my o2 sensor as an 'Oxygen sensor'

Fact: the volt meter measuring the signal wire from the 'Oxygen Sensor' flucuates between 2 and 2.5 volts with a fully warmed engine running at idle.

According to the facts: The ECU acts like it is narrow band; the adhol.com schematics calls it a 'narrow band'; the volt meter reading acts like it is a wide band.

Fact: if I connect the efie to my car and it turns out to NOT work I am out $80 with no consumer protection.

In my opinion the manufactor has a responsibility to know if the products will serve those they market their product. So, what is this sensor, narrow or wide band?

L_Green
09-28-2008 08:32 PM
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rawsonjenkins Offline
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Post: #9
RE: ECU Reading
l_green Wrote:
cmac0351 Wrote:What did you use to get those readings? I have been wanting to actually see the o2 voltage in response to adding HHO. If it is causing the computer to go rich, those readings should be lower when HHO is added, right?

I used an ELM 327 scantool.

These reading were without HHO gas.

Here is my problem:

Fact: we are told that narrow band sensors flucuate between .1 to 1 volt DCV.

Fact: we are told that if adhol.com schematics label the o2 sensor as 'Oxygen Sensor' it is narrow band.

Fact: these reading are taken directly from the ECU not a volt meter and flucuate between .01 to 1 volts.

Fact: the adhol.com schematic labels my o2 sensor as an 'Oxygen sensor'

Fact: the volt meter measuring the signal wire from the 'Oxygen Sensor' flucuates between 2 and 2.5 volts with a fully warmed engine running at idle.

According to the facts: The ECU acts like it is narrow band; the adhol.com schematics calls it a 'narrow band'; the volt meter reading acts like it is a wide band.

Fact: if I connect the efie to my car and it turns out to NOT work I am out $80 with no consumer protection.

In my opinion the manufactor has a responsibility to know if the products will serve those they market their product. So, what is this sensor, narrow or wide band?

L_Green
I have a 2004 Dakota 4.7V8 with narrowband O2 sensors. The OEM replacements by Bosch & Denso for this vehicle are narrowband & I get readings from my Deluxe Dual EFIE like you do. Initially they are in the range your ECU gives you & will then jump to 2.5+V range. I've been wks attempting to adjust my EFIE offsets to gain any MPG without success. So even tho we have narrowband sensors as classified by the makers of these sensors they can not apparently be offset to gain anything in our Chryler products?? We're just stuck apparently.
09-29-2008 02:00 AM
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mike Offline
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Post: #10
RE: ECU Reading
l_green Wrote:
JonnyBravo Wrote:Appears to be a narrowband - narrowband 02 sensors fluctuate between 0.2 and 0.9 volts, and according to your chart, that's exactly what you're getting.

There are at least 30 readings below the 0.2 volt parameter. Does this 'widen' the range and indicate a wide band type of sensor?

The actual voltages of a healthy oxygen sensor will be as low as 0 volts (or very close), and as high as 1.1 volts. You usually won't see these peaks and valleys unless you observe the signal on an oscilloscope.

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09-29-2008 08:51 AM
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