Possible Causes
| Possible Causes |
|---|
| INTERMITTENT DTC |
| (K99) O2 1/1 HEATER CONTROL CIRCUIT SHORTED TO VOLTAGE |
| (K99) O2 1/1 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE |
| OXYGEN SENSOR 1/1 |
| POWERTRAIN CONTROL MODULE (PCM) |
Perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .