Camshaft sensor failure with engine failure light on
The main function of the camshaft sensor is to detect the position and rotation angle of the camshaft, so as to determine the position of the top dead center of the air compression stroke of the engine 1 cylinder. When starting, the engine computer provides signals based on the camshaft position sensor and the crankshaft position sensor, recognizes the stroke and position of the cylinder piston, controls the sequence of fuel injection and ignition, and performs accurate fuel injection and ignition control.
Common failures of camshaft position sensor:
1. Not working during ignition
2. Fuel consumption increase
p>3. There is no force when the engine is working.
Causes of the failure of the camshaft position sensor:
1. The camshaft is broken or damaged, which will cause the car to hit The fire is not working and the engine cannot be started.
2. If the ECU cannot obtain information, there will be no sequential fuel injection, resulting in increased fuel consumption, inability to increase the speed, and weak acceleration.
3. Because the camshaft position sensor is broken, the ECU cannot obtain the information of the camshaft position change, and cannot detect the change of the camshaft position, which affects the intake and exhaust system, thereby affecting the engine performance.
How to detect the camshaft position sensor:
The most commonly used in vehicles is the Hall type camshaft sensor, which has three wires, one is a 12V or 15V power cord, and one It's the signal wire, and the other is the ground wire. Pull out the plug and use a multimeter to measure the voltage. One meter is connected to the power cord and the other is connected to the ground wire. Turn on the ignition switch, the voltage should be above 4.5V. If the voltage is zero, it means that there is a short circuit or open circuit in the camshaft sensor harness.
The above is the introduction to the camshaft sensor and the reasons for common failures and how to detect them. I hope to help the owner and solve the difficulties.
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