DTC Detection Logic
ECM detects a voltage of power source for sensor is excessively low or high
| DTC | CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| P0643 | SENSOR POWER/CIRC (Sensor reference voltage "A" circuit high) |
Diagnosis condition | Start engine and let it idle |
| Signal (terminal) | Sensor power supply 1 circuit | ||
| Threshold | ECM detects a voltage of power source for sensor is excessively low or high | ||
| Diagnosis delay time | - | ||