I've complied a list of CCID codes which can be helpful in some cases for low level diagnostics-
http://www.endtuning.com/ccidcodes.html
These codes are primarily designed to tell the dash which warning lights and messages to display, so they won't take the place of true diagnostics, but can help point people in the right direction.
http://www.endtuning.com/ccidcodes.html
These codes are primarily designed to tell the dash which warning lights and messages to display, so they won't take the place of true diagnostics, but can help point people in the right direction.