2010 m8 turbo ECU p21 code

[krysten]

Anybody know what it's about? Thanks!

 

[sledhead800]

Anybody know what it's about? Thanks!

I think it should say on your ecu what the code means.

 

[Cat 4evr]

its detonating. 21 is for milder engine knock code 23 for more serious engine knock. Better check into it before KABOOM