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

Fuel Monitor or HO2S Repair Verification Drive Cycle

1. Complete OBD II Vehicle Prep&ation
2. Start the engine and drive the vehicle for 7 minutes.
(1). Drive in stop and go traffic for 6 minutes, including one idle.
(2). Accelerate to 45 mph (72 km/h). Maintain speed for 1 minute.

3. Rerun Continuous Memory, KOEO and KOER self-tests.