Operation CHARM: Car repair manuals for everyone.
Home >> Subaru >> 1989 >> XT-6 4WD L6-2.7L SOHC >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> O2 Monitor Lamp
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

O2 Monitor Lamp

LED Oxygen Monitor Lamp:





PURPOSE
Indicates ECU ID codes and trouble codes.

LOCATION
On the ECU.

OPERATION
When the system is in "U-CHECK" mode and the "CHECK ENGINE" lamp is off, the O2 monitor lamp will flash the ID code. When the "CHECK ENGINE" lamp is on or when the system is in the "D-CHECK" mode, the monitor lamp will flash trouble codes.

pro multis · About Operation CHARM