October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Possible Causes

Possible Causes
INTERMITTENT DTC
(K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO GROUND
(K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO GROUND
(K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO THE (K904) O2 RETURN (DOWN) CIRCUIT
2/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.