Well others have posted 63 as well but nobody has explained it. Book say as I listed "Control unit self-test, Safety Concept master check" to me sounds like a master cylinder check. People have posted it on this site but never got an answer. I will have to recheck code to make sure it is not b3 as I cleared it so I have to wait for its return. Others have said go to dealer to get it explained in other posts!! Does anyone here know what a "Control unit self-test, Safety Concept master check" code means? If it is b3 " catalyst system efficiency bank 2" is that a catalytic converter failure?
Ard, how do u like your 996TT compared to E39 M5? I've been looking in that direction but love my M5 a lot and afraid I will regret not driving it.
Did you look at the link I posted? Pictures of the codes, Apples had what he thought was a 63 but was b3.
Did you know that there is no wire from the Cat that sends a signal when the Cat goes bad?
You get a 'bad cat' code when the signals from the pre and post cat O2 sensors start to show too much 'similarity'- due to aging sensors or overly rich conditions swamping the conversion capacity of the cat. Or from a bad cat.
There are MANY posts on diagnosing these codes (b2 & b3)
As to the 996TT- two wholely different cars. The M5 is my daily driver- handling, torque, power, poise...in contrast the TT is a visceral beast with no manners. Even stock the TT makes you go "Whoa"... add 120 hp to that.
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