coasTTal

During some pretty normal driving to work this morning a CEL pops up. TT is driving normal and plenty of boost.

Tonight I check and have:
16806 Main Catalyst Bank1 - Efficiency Below Threshold
17584 Bank 1 02S Lambda Correction Behind Catalyst Control Limit Reached.

Only changes on the TT were to reinstall the TTDA about a week ago. TT has most all the stuff everyone else has and has been pretty uneventful for months, then this.

Your thoughts

TTschwing

Block 32 and see what it says. First code is common to guys with Race cats cause they don't come up to temp. Second could be a failed 02 sensor which could cause rich running and consequently a cold CAT...

coasTTal

Will try to run and do later tonight. What would look like bad values?

JustAdam

I totally appreciate what you do, and almost as importantly, why you do it.

It is the passion for the TT that STILL has me in awe.

Thanks for all the help you have helped me with too, I just might be calling you still from time to time.

TTschwing

Just turn on the key and Vag it in the garage. + values indicate lean corrections, - values would be rich corrections. Ideally should be +/- 5% (these are idle and partial throttle adaptation maps that are directly influenced by MAF and 02 health)

TTschwing

Thanks Adam...BTW was great to meet you finally!