3131-O2 Sensor Short To Ground: Notes
For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS article.
- When Monitored:
With the ignition on and the Oxygen Sensor Heater command on.
- Set Condition:
The ECM detects that the O2 1/1 Heater Control circuit is shorted to ground for 2.0 seconds.
| Possible Causes |
|---|
| INTERMITTENT DTC |
| O2 1/1 HEATER CONTROL CIRCUIT SHORTED TO GROUND |
| O2 1/1 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE |
| OXYGEN SENSOR |
| ENGINE CONTROL MODULE (ECM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.