Secondary o2 Sensor Keeps Dying
 

Last year, I got P0137, P0037, and P0141 codes during a track day. After clearing several times only to have it return, I did some searching here and saw it was most likely a dead secondary o2 sensor.

I replaced the sensor, but now not even a year later, I got the same codes at a track day again! Could it be because of the mods I have? Should I just disable these CELs?? I really don't want to have to be buying secondary o2 sensors every few months...


engine mods:
JDL UEL header, OP, FP
MotoEast flex fuel (EVAP connection)
Dyno tuned via ECUtek

I also go through the rear 02 sensors 2 times a year. I figured mine was because the turbo though.

Os your header cattless? If you arent using it for emissions you could try a spacer to back it out of the exhaust flow to prolong its life.

It is catless. I have a catalytic converter and resonator in the front pipe for emissions.


I'm thinking it may have to do with tracking. A friend of mine has the same set up and has burned through 2 or 3 o2 sensors as well. Did you disable your codes with ecutek?

You will need to disable dtc codes and also the rear 02 fueling compensations

Ended up having my tuner do just that. Ran 2.5 hours on track this past weekend and no sign of the codes. Will report back on emissions testing and whether OBDII reports systems ready soon.:party0030: