Possible Causes
| Possible Causes |
|---|
| INTAKE O2 HEATER CONTROL CIRCUIT SHORTED TO VOLTAGE |
| INTAKE O2 HEATER CONTROL CIRCUIT OPEN/HIGH RESISTANCE |
| INTAKE O2 SENSOR GROUND CIRCUIT OPEN/HIGH RESISTANCE |
| INTAKE OXYGEN SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .