Civic HX Lean Burn Monitoring via ScanGauge (Video + Info)

[Hondamate]

Originally Posted by jcp123

Maybe. If the honeycomb melted and is clogging the pathway, it sure could impact your mileage. If all it is, is a substrate material which has been "used up", it should have only a minimal impact on MPG. Downstream O2 sensors barely factor into your fuel trims. If you only got p0420 today, I doubt the computer is correcting anything enough to affect MPG.

Ok thank you

[firehawk618]

Originally Posted by cbaber

Is it the same readout of 0-125? The SG also has codes to enter that are listed as A/F Ratio Sensor 1 Bank 1, but when I enter those in no data shows up. Honda must not display that data, which is a shame because the actual A/F ratio readout would be more helpful than just the voltage.

Do you have similar experiences with lean burn conditions? I was a little worried at first because I have a cheap(er) O2 sensor. It game me codes and trouble until I figured out my non-OEM exhaust manifold was the problem. Switched back to an OEM setup and LB started working again, codes gone. The only thing now is that my EGR valve is broken. I actually have the connector disconnected from the EGR valve, so another interesting FYI, the LB works without EGR.

Actually the ECU does in fact report target afr and actual afr.

I can pull them up with my Launch Diagun tool.

I also get nothing when trying to program the afr xgauge.

I have had ZERO luck finding someone who has posted any good xgauge codes for our ISO9141 Hondas.

I wish I knew more about binary and crap.

I ended up returning my Scangauge as it was virtually worthless as far as x-gauges go. I can easily see when LB has engaged via the Ultragauge. I don't watch the rear sensor, I watch the front.

[1hondaman]

Video Demonstration

I shot this video on cold night home from work. It demonstrates the different readings for different load conditions. Remember, low load = lean burn. The captions in the video explain what is going on.

http://youtu.be/r9GDerlnzOQ

CBABER 3-19-14
This video you posted is no longer there. Is it something you can re-load, I would like to see it.

[98hxman]

hi all i am using the torque pro app on my cell phone with the best bluetooth adapter that torque list. with the app i can read out the main lean air fuel sensor voltage in 0.230V to as high as 0.750V on a really cold night. when in lean burn in my 98 civic hx 5 speed i see numbers around 0.420V to 0.472V in normal crusing i range from 0.500V to 0.599V. when wide open throttle i see 0.600V and up. i can also read out a lot of live data and read can clear codes when driveing.