DTC Advanced Diagnostics: P0642, P0643: General Description
The powertrain control module (PCM) is equipped with a 5 V power supply circuit to supply a stable 5 V to each sensor as reference voltage. The correct voltage for the sensors are loaded in the microcomputer (MCU) of the PCM (A/D input). If the sensor power voltage is a set value for a certain time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 0.5 second or more |
| DTC Type | One drive cycle, MIL on |