2028-02 Sensor Pump Current Open: Notes
For complete wiring diagrams, refer to SYSTEM WIRING DIAGRAMS .
| 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. See DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure