[josephtaye]

Have a 2011 335 FBO on stage 2+ MHD, been having a CEL that comes and goes for almost 2 years, took it to the shop many many times and everything was checked and repaired (valve cover, inlets, outlets, intake, MAF, smoke down test, break booster) and the CEL will be gone for a month or so but now it’s back and stronger then ever, no other codes, no loss of power no rough idle. Could this be something related to the tune? Or a DME or software issue? I need to pass inspection and because of this im stuck! I really need help to pass inspection Cause Apprently there is no boost leak or unmeasured air. I know i can’t be the only one to deal with this, any help is appreciated thank you

[VXEric]

What is the actual code? I've been fighting similar and done tons of diagnostics. I think I've finally narrowed it to the pre-cat O2 sensor. Working on replacing it but it's very stuck lol

[josephtaye]

Originally Posted by VXEric

What is the actual code? I've been fighting similar and done tons of diagnostics. I think I've finally narrowed it to the pre-cat O2 sensor. Working on replacing it but it's very stuck lol

Codes are 2BCO and 2BEA, and let me know if that works but I’m not sure if an O2 sensor trips only system lean codes 🤔

[King Rudi]

I don't remember the code, but I too had a system too lean code. Mine was my MAP sensor. Replaced, no more issue.

[Mister_R]

Originally Posted by josephtaye

Have a 2011 335 FBO on stage 2+ MHD, been having a CEL that comes and goes for almost 2 years, took it to the shop many many times and everything was checked and repaired (valve cover, inlets, outlets, intake, MAF, smoke down test, break booster) and the CEL will be gone for a month or so but now it’s back and stronger then ever, no other codes, no loss of power no rough idle. Could this be something related to the tune? Or a DME or software issue? I need to pass inspection and because of this im stuck! I really need help to pass inspection Cause Apprently there is no boost leak or unmeasured air. I know i can’t be the only one to deal with this, any help is appreciated thank you

Are your readiness monitors "Ready"? In NY you can pass with one not ready. I had an evap code a few months back and with downpipes installed I HAD to purchase and install a DP Fix to pass...