Operation CHARM: Car repair manuals for everyone.
Home >> Honda >> 1999 >> Civic GX Sedan L4-1.6L CNG >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair >> How to Reset the ECM/PCM
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

How to Reset the ECM/PCM

Engine Control Module (ECM)/Powertrain Control Module (PCM) Reset Procedure

NOTE: Resetting the ECM/PCM will erase any stored DTCs and any freeze data. It will also restart all readiness code monitors.

Either of the following actions will reset the ECM/PCM.
* Use the OBD II scan tool or Honda PGM Tester to clear the ECM's/PCM's memory.

NOTE: See the OBD II scan tool or Honda PGM Tester user's manuals for specific operating instructions.





* Turn the ignition switch OFF. Remove the BACK UP (7.5 A) fuse from the under-hood fuse/relay box for 10 seconds.

NOTE: Removing the BACK UP (7.5 A) fuse cancels the clock and the radio presets. Make note of the customer's presets so you can reset them.

pro multis · About Operation CHARM