Possible Causes
| Possible Causes |
|---|
| RESISTANCE IN THE O2 SENSOR 1/2 HEATER CONTROL CIRCUIT IS TOO HIGH OR LOW |
| RESISTANCE IN THE FUSED ASD RELAY OUTPUT CIRCUIT IS TOO HIGH OR LOW |
| O2 SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to STANDARD PROCEDURE .