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Originally Posted by Juanito08
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That log looks fine your LTFT is only around 3% max so thats good
Your AFR look fine and appears to be folowing the Open loop fuel tables well
P2096 is a lean condition and that log is not showing it but it could be an intermittent exhaust or, intake leak near maf sensor or downstream of maf sensor . check that as well as exhaust flanges near O2 sensors
The AFR is based of the readings of the front 02 sensor, but its likely the rear O2 sensor that causes code p0420 and p2096 or the difference in readings of the front and rear 02 sensors.
As you have an OFT you can monitor the rear O2 sensor as well by selecting WIDEBAND AFR log parameter the scaling might be a bit off as your supposed to install an aftermarket sensor., but for the purpose of checking the rear 02 sensor it should work.
I just tried it on my car and the front and rear reading move in sync once the sensors are warmed up
do another log and log
Wideband Afr
afr
afr commanded
ltft
maf v
rpm engine speed
throttle
fuel pressure
the afr , wideband afr and commanded afr should all follow each other. The second 02 sensor appears to take a couple of minutes to heat up and produce a reliable signal.
If you definitly dont have any intake or exhaust leaks its possible the rear o2 sensor may be damaged or not working properly or cross threaded loose cable not plugged in correctly ect.
is the p2096 code permanent can it be cleared ?