What to do if the camshaft position sensor leaks

Hello car owner, oil leakage is generally caused by the aging and hardening of the sealing rubber ring, which can be solved by replacing the rubber ring or playing sealant, and choose to replace it if necessary.

Hello, this one suggests that you change the camshaft position, the O-ring on the sensor will do it.

The role and principle of the camshaft position sensor.

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Camshaft position sensor is a sensing device, also known as synchronous signal sensor, it is a cylinder discriminating positioning device, input camshaft position signal to ECU, is the main control signal of ignition control.

The Camshaft Position Sensor (CPS) is used to collect the camshaft motion angle signal and input it into the electronic control unit (ECU) to determine the ignition time and fuel injection time. Camshaft position sensor (CPS) is also known as cylinder identification sensor (CIS), in order to distinguish it from crankshaft position sensor (CPS), camshaft position sensor is generally represented by CIS. The function of the camshaft position sensor is to collect the position signal of the valve camshaft and input it into the ECU, so that the ECU can identify the top dead center of cylinder 1 compression, so as to carry out sequential fuel injection control, ignition time control and deflagration control.

In addition, the camshaft position signal is used to identify the first moment of ignition when the engine is started. Because the camshaft position sensor is able to identify which cylinder piston is about to reach the top dead center, it is called a cylinder recognition sensor.

Even after saving the new sensor, there is still a little oil leakage.

Regarding the landlord's concern about "what should I do if the camshaft position sensor is broken?" "Here's my personal opinion:

Broken performance of the camshaft position sensor:

1. The camshaft position sensor can determine the ignition sequence, if it is broken, it will cause the ignition to be ineffective, and the engine is not easy to start;

2. It is difficult to add up refueling; After the engine is weak and the camshaft position sensor is broken, the ECU cannot detect the position change of the camshaft, and the position change of the camshaft cannot be detected correctly, which affects the air intake and exhaust volume of the near-exhaust system, and then affects the engine performance;

3. The increase in fuel consumption and the camshaft position sensor are broken, and the computer will inject fuel in disorder! Resulting in fuel consumption, the car is not sensitive, and the speed cannot be increased;

4. The car trembles; The fault light is on non-stop; The engine suddenly stalled when the car was hot.

Camshaft position sensor failure, you can check the camshaft position sensor by an alternative method, and then use a diagnostic computer to read and disassemble the method of removing the fault. If faults** are reported too many times, it is necessary to replace the camshaft position sensor.

The cam brigade shaft position sensing absorber is one of the most important sensors in the engine's electronic control system. Its function is to provide a signal to the electronic control unit of the trip computer to determine the position of the piston, and thus determine the ignition timing and sequential injection of the engine. If the engine lacks or fails to receive the correct position signal from it, it will have difficulty starting, failure to accelerate, exceeding the standard, unstable idling, etc., but the cause of these phenomena is not necessarily damage to the sensor itself or its related circuitry.

In order to accurately and quickly diagnose the fault of the camshaft position sensor, it is necessary to correctly understand the characteristics of the camshaft position sensor and its structure, working principle and method.

A faulty camshaft position sensor will have the following effects:

1.The engine starts hard or does not start, i.e. the ignition is ineffective. This is because the camshaft position sensor can ** the firing sequence, and if something goes wrong, it is naturally difficult to start.

2.The fuel consumption of the engine increased. If the camshaft position sensor fails, the driving computer will not be able to inject fuel accurately, resulting in increased fuel consumption.

3.The power drops, the engine is weak. If the camshaft position sensor fails, the trip computer will not be able to detect the camshaft position change, which in turn will affect the intake and exhaust volumes, resulting in a decrease in power.

4.It's easy to knock on the door.

5.The engine fault light is on.

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The fault performance of the camshaft position sensor is broken, the car has a high-pressure fire, but the starting time is long, and the car can be transported in the end

1. During the starting process, there will be a phenomenon of counter-circular balance rotation of the crankshaft, and there will be a phenomenon of tempering in the intake manifold;

2. The idle speed of the car is unstable and the shaking is serious, similar to the failure of the car cylinder;

3. The car accelerates weakly, the car can't run, and the speed exceeds 2500 rpm.

4. The car will have high fuel consumption, excessive exhaust emissions, and unpleasant black smoke from the exhaust pipe.

There are three main types of crankshaft position sensors, namely magnetoelectric induction, Hall effect and photoelectric type. Crankshaft position sensor failures can occur for different reasons depending on the type. The main reason is the damage of the magnetic pulse signal disc and magnetic head.

1) Advantages of magnetoelectric induction: simple structure, sturdy and durable, high temperature resistance, and low requirements for assembly. Cons:

The signal is susceptible to interference, and the disturbance ECU requires the design of relevant signal processing circuits, which have low accuracy and are not suitable for engines with VVT. The failure of the magnetoelectric induction slow attitude crankshaft position sensor was that the engine could not start, and when checking the engine condition, it was found that the ignition was too late as the real cause of the engine not starting. Workaround:

Reconnect the wiring, readjust the distributors, and check the ignition timing. (2) Advantages of Hall effect: the output is a digital signal with high precision.

Disadvantages: High assembly requirements, rotation-sensitive installation, and integrated electrical components, EMC requirements. Hall-effect crankshaft position sensors control the engine for sequential fuel injection, ignition timing and knocking, and in the event of a malfunction, the transmission signal is out of the normal range.

Solution: Check whether the permanent magnet, magnetic guide plate and integrated circuit are normal. (3) The fault of the photoelectric photoelectric crankshaft sensor is the poor acceleration of the engine, and the phenomenon of automatic flameout will occur when starting, and sometimes there will be high-voltage electric sparks.

The reason for the occurrence of the ignition system is that the ignition system is not working well, resulting in a weak high-pressure fire. Solution: Check the internal short circuit of the low-voltage circuit, main relay, high-voltage ignition coil, faulty engine control unit and abnormal wear of some mechanical parts.

Photo by Shi Lili of Pacific Automobile Network).