2668-O2 Sensor Overload Value Too Low: Notes
For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.
| Possible Causes |
|---|
| INTERMITTENT DTC |
| POWER SUPPLY CIRCUIT SHORT TO GROUND |
| O2 SENSOR CIRCUITS OPEN |
| O2 SENSOR CIRCUITS SHORT TO GROUND |
| O2 SENSOR CIRCUITS SHORTED TOGETHER |
| O2 SENSOR CIRCUITS SHORT TO VOLTAGE |
| POWER SUPPLY OPEN |
| OXYGEN SENSOR |
| ENGINE CONTROL MODULE (ECM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.