ECM sets DTC P0642 if the ECM detects reference voltage is lower than specification.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Signal check | 1. Poor connector connection 2. Short to ground in sensor A power supply circuit 3. Faulty ECM/PCM |
Enable Condition |
•
- | |
Threshold Value |
•
Reference voltage is lower than 4.24V | |
Diagnosis Time |
•
Continuous | |
MIL ON Condition |
•
2 driving cycles |
