Hi community
I have recently had VRSF Catless Downpipes installed on E90 335i and am seeing 2CA6 and 2CAA codes which seem to one point to pre and post cat heating for Bank 1.
I use MDH tune (kept to stage 1 for now to be safe) and have run reset all calibrations but cannot get rid of these codes. These are in fact the only codes I am seeing and the car runs beautifully.
My biggest concern is AFR's and I think it might be from the codes I am seeing - Running logs from MHD I am seeing on boost the following results:
At 12.8 PSI
Bank 1 - Lambda ~17.8
Bank 1 - STFT 0
Bank 2 - Lambda ~12.1
Bank 2 - STFT -12
Bank 1 seems wayyy to lean but I don't know if this is a false reading due to 2CA6 and 2CAA error codes. Is it possible secondary O2 sensors being around the wrong way would cause this? The reason I ask is I am amost positive secondary O2 was grey in bank 1 when I looked under the car on the weekend and I thought BANK 1 was black for primary and secondary O2.
Before I get the car up on ramps again just thought I would check with the community here to get thoughts on 2CA6 and 2CAA as these just don't seem to want to go away and if they are not typically caused by secondary O2 issues I will start my troubleshoot elsewhere.
NOTE: I have catless DP check on MHD but do still have a hollow yellow engine check light - as said no other error codes besides these
I have recently had VRSF Catless Downpipes installed on E90 335i and am seeing 2CA6 and 2CAA codes which seem to one point to pre and post cat heating for Bank 1.
I use MDH tune (kept to stage 1 for now to be safe) and have run reset all calibrations but cannot get rid of these codes. These are in fact the only codes I am seeing and the car runs beautifully.
My biggest concern is AFR's and I think it might be from the codes I am seeing - Running logs from MHD I am seeing on boost the following results:
At 12.8 PSI
Bank 1 - Lambda ~17.8
Bank 1 - STFT 0
Bank 2 - Lambda ~12.1
Bank 2 - STFT -12
Bank 1 seems wayyy to lean but I don't know if this is a false reading due to 2CA6 and 2CAA error codes. Is it possible secondary O2 sensors being around the wrong way would cause this? The reason I ask is I am amost positive secondary O2 was grey in bank 1 when I looked under the car on the weekend and I thought BANK 1 was black for primary and secondary O2.
Before I get the car up on ramps again just thought I would check with the community here to get thoughts on 2CA6 and 2CAA as these just don't seem to want to go away and if they are not typically caused by secondary O2 issues I will start my troubleshoot elsewhere.
NOTE: I have catless DP check on MHD but do still have a hollow yellow engine check light - as said no other error codes besides these