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

Accessing and Reading Diagnostic Trouble Codes

The Action Taken When the DTC Sets are the steps the PCM takes after the DTC is set. These actions serve one of three purposes:
^ To inform the driver of the problem.
^ To preserve the driveability of the vehicle.
^ To prevent the failure from causing any damage to the vehicle.