Do you mean "What is a sensor in a circuit?" have a look at the link to the Wikipedia entry,
I guess Electric Circuit....
A circuit diagram could be related to a closed circuit if the diagram is of a closed circuit.
A closed path through which electrons flow is known as a circuit.
an open circuit is a circuit that does not complete the circle. an open circuit does not do the job as the electricity stands still a short circuit is a circuit that wires have crossed and the electricity takes the shortest path. and does not complete all of the points on the circuit
A thermistor changes its resistance when the temperature changes. This means as the room temperature changes the current in the circuit containing the thermistor changes. This change in current is detected by the heater circuit, turning the heater on and off.
MAP sensor circuit low.MAP sensor circuit low.
Map sensor circuit voltage highMap sensor circuit voltage high
Camshaft position sensor circuit malfunction.Camshaft position sensor circuit malfunction.
heater sensor circuit Chevy astro 2000
P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Power steering pressure sensor circuit performancePower steering pressure sensor circuit performance
31manifold and/or airflow meter sensor signal circuit--airflow meter/circuit--manifold pressure sensor/circuit--ecu
P0344 Camshaft Position Sensor Circuit IntermittentP0344 Camshaft Position Sensor Circuit Intermittent
Downstream O2 sensor circuit volts high.Downstream O2 sensor circuit volts high.
P0344 = Camshaft position sensor 'A' circuit intermittant (Bank 1 or single sensor)'A' circuit is intake side. 'B' circuit is exhaust side.
9 time out of 10, the heater circuit internal to the sensor has failed. Replace the sensor.
It is O2 Sensor Circuit Malfunction possibly (bank 2 Sensor 2) Yogi karki It is O2 Sensor Circuit Malfunction possibly (bank 2 Sensor 2) Yogi karki