Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Hard Code

Any Diagnostic trouble codes (or One-Trip failure or drive cycle) that comes back within one cycle of the ignition key is a "hard" code. This means that the problem is there every time the TCM checks that circuit or function.

NOTE: OBDII CODES WILL NOT SET WITH JUST THE IGNITION KEY ON. THEY MUST BE DRIVEN, IN THE VEHICLE START AND DRIVE CYCLE(S) SUCH THAT ALL DIAGNOSTIC MONITORS HAVE RUN.