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

Trouble Code Erasure

A Diagnostic trouble code will be cleared from TCM memory if it has not reset for 40 warm-up cycles.
A warm-up cycle is defined by CARB as "sufficient vehicle operation such that the coolant temperature has risen by at least 40°F from engine starting and reaches a minimum temperature of 160°F."
The Malfunction Indicator Lamp (MIL) will turn off after 3 good trips, or when the DTC's are cleared from the TCM.