[williamkaiser1]

I'm new to the community, searched the boards and still have some questions

I bought a 2010 E92 with 125k on the odo (I know) from a Subaru dealer that they received on trade-in. The more I mess with it the more mods I'm finding on it. The dealer has no idea what was done to it and I have no way of contacting the previous owner, but everything I'm finding so far seems pretty standard; Burger dual cone intake, oil catch can, etc..

I've got a check engine light for issues involving O2 sensors
Codes:
2c31 Lambda probe in front of catalyst trim control
2c32 Lambda probe in front of catalyst 2 trim control
2c6a Lambda probe after catalyst reversed
2c6b Lambda probe after catalyst system check
2ded power management, closed circuit monitoring
2c2c Lambda probe before catalyst 2 system check
2c2b Lambda probe before catalyst system check

I get under the car to change the 02 sensors and discover I've got a VRSF catless downpipe, so I held off on changing them. Are the above codes consistent with running a catless DP without a tune? I have no idea if this thing is running a tune or not.

Also I have a stutter/hesitation between 3-4k RPM under 50-75% throttle, could the above also possibly be causing this condition. I've changed the plugs and coil packs, and I know they run rich when there's a problem with the O2 sensors.

I know I've got to run a tune with this setup (most likely just going with MHD stage 1), I just don't know if it would fix these particular issues

[SlowE92]

Originally Posted by williamkaiser1

I'm new to the community, searched the boards and still have some questions

I bought a 2010 E92 with 125k on the odo (I know) from a Subaru dealer that they received on trade-in. The more I mess with it the more mods I'm finding on it. The dealer has no idea what was done to it and I have no way of contacting the previous owner, but everything I'm finding so far seems pretty standard; Burger dual cone intake, oil catch can, etc..

I've got a check engine light for issues involving O2 sensors
Codes:
2c31 Lambda probe in front of catalyst trim control
2c32 Lambda probe in front of catalyst 2 trim control
2c6a Lambda probe after catalyst reversed
2c6b Lambda probe after catalyst system check
2ded power management, closed circuit monitoring
2c2c Lambda probe before catalyst 2 system check
2c2b Lambda probe before catalyst system check

I get under the car to change the 02 sensors and discover I've got a VRSF catless downpipe, so I held off on changing them. Are the above codes consistent with running a catless DP without a tune? I have no idea if this thing is running a tune or not.

Also I have a stutter/hesitation between 3-4k RPM under 50-75% throttle, could the above also possibly be causing this condition. I've changed the plugs and coil packs, and I know they run rich when there's a problem with the O2 sensors.

I know I've got to run a tune with this setup (most likely just going with MHD stage 1), I just don't know if it would fix these particular issues

If you have the MHD app it'll tell you what tune your running if you are or not.

[SlowE92]

Originally Posted by williamkaiser1

I'm new to the community, searched the boards and still have some questions

I bought a 2010 E92 with 125k on the odo (I know) from a Subaru dealer that they received on trade-in. The more I mess with it the more mods I'm finding on it. The dealer has no idea what was done to it and I have no way of contacting the previous owner, but everything I'm finding so far seems pretty standard; Burger dual cone intake, oil catch can, etc..

I've got a check engine light for issues involving O2 sensors
Codes:
2c31 Lambda probe in front of catalyst trim control
2c32 Lambda probe in front of catalyst 2 trim control
2c6a Lambda probe after catalyst reversed
2c6b Lambda probe after catalyst system check
2ded power management, closed circuit monitoring
2c2c Lambda probe before catalyst 2 system check
2c2b Lambda probe before catalyst system check

I get under the car to change the 02 sensors and discover I've got a VRSF catless downpipe, so I held off on changing them. Are the above codes consistent with running a catless DP without a tune? I have no idea if this thing is running a tune or not.

Also I have a stutter/hesitation between 3-4k RPM under 50-75% throttle, could the above also possibly be causing this condition. I've changed the plugs and coil packs, and I know they run rich when there's a problem with the O2 sensors.

I know I've got to run a tune with this setup (most likely just going with MHD stage 1), I just don't know if it would fix these particular issues

But yes either faulty 02 sensors, or you dont have a tune suppressing the no cat codes.

[SlowE92]

Originally Posted by williamkaiser1

I'm new to the community, searched the boards and still have some questions

I bought a 2010 E92 with 125k on the odo (I know) from a Subaru dealer that they received on trade-in. The more I mess with it the more mods I'm finding on it. The dealer has no idea what was done to it and I have no way of contacting the previous owner, but everything I'm finding so far seems pretty standard; Burger dual cone intake, oil catch can, etc..

I've got a check engine light for issues involving O2 sensors
Codes:
2c31 Lambda probe in front of catalyst trim control
2c32 Lambda probe in front of catalyst 2 trim control
2c6a Lambda probe after catalyst reversed
2c6b Lambda probe after catalyst system check
2ded power management, closed circuit monitoring
2c2c Lambda probe before catalyst 2 system check
2c2b Lambda probe before catalyst system check

I get under the car to change the 02 sensors and discover I've got a VRSF catless downpipe, so I held off on changing them. Are the above codes consistent with running a catless DP without a tune? I have no idea if this thing is running a tune or not.

Also I have a stutter/hesitation between 3-4k RPM under 50-75% throttle, could the above also possibly be causing this condition. I've changed the plugs and coil packs, and I know they run rich when there's a problem with the O2 sensors.

I know I've got to run a tune with this setup (most likely just going with MHD stage 1), I just don't know if it would fix these particular issues

I would also advise to clear codes and reset all adaptations before driving it lol cause lord knows how long its been running with those codes, and avoid leaning out

[williamkaiser1]

Good deal, thank you for the info and quick reply.