| DTC Strategy |
- Evaluate O2 sensor heater performance
|
- Related fuse blown or missing
- Heater control circuit open or short
- Power supply circuit open or short
- Poor connection or damaged harness
- Faulty HO2S
|
| Enable Conditions |
- See catalyst diagnosis (P0420) activation condition (DTC Detecting Condition )
- No relevant failure
- Sensor tip temperature is higher than 640°C (1, 184°F)
- Battery voltage between 11V and 16V
|
| Threshold Value |
- Upstream O2 sensor tip temperature is lower than 680°C (1256°F)
|
| Diagnostic Time |
|
| Mil On Condition |
|