2007 > G 3.3 DOHC > Engine Unleaded EOBD > P0641 Sensor Reference Voltage A Circuit/Open > General Information
The ECM provides a 5volt reference voltage to the Acceleration Position Sensor 2(APS2) , Throttle Position Sensor 1(TPS1), A/C pressure sensor and power steering sensor. The ECM monitors reference voltage deviation from the power supply circuit of the sensors.
Checking the voltage from sensor power supply every 1.87 sec. under detecting condition, if the value within detecting condition lasts for more than 0.2 sec., ECM sets P0641. MIL(Malfunction Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
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