What is 5v reference?
What is 5v reference? The foundational concept is simple: a 5-volt reference flows through a sensor containing a resistance that varies according to changes in temperature, pressure or position. Due to this variable resistance, the signal return voltage to the ECM is always less than the reference voltage. What does the sensor code p0641 stand for? The sensor in question is typically associated with the automatic transmission, transfer case, or one of the differentials. This code will almost always be accompanied by a more specific sensor code. The P0641 adds that the circuit is open. Why is the p0641 Chevrolet...