Possible Causes
| Possible Causes |
|---|
| INTAKE O2 SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| INTAKE O2 RETURN CIRCUIT SHORTED TO VOLTAGE |
| INTAKE O2 POSITIVE CURRENT CONTROL CIRCUIT SHORTED TO VOLTAGE |
| INTAKE O2 PUMP CELL CURRENT TRIM CIRCUIT SHORTED TO VOLTAGE |
| INTAKE O2 SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .