Possible Causes
| Possible Causes |
|---|
| INTERMITTENT DTC |
| (K299) O2 1/2 HEATER CONTROL CIRCUIT SHORTED TO VOLTAGE |
| (K299) O2 1/2 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE |
| OXYGEN SENSOR 1/2 |
| POWERTRAIN CONTROL MODULE (PCM) |
Perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .