The camshaft position sensor plays the role of an important element in the design of the VAZ 2114 car. It is available on almost all engines, regardless of the number of valves (8 under the euro or 16).
Its main purpose is to determine the operating phase of the engine with the subsequent release of a pulse signal. Thanks to its use, engines began to transmit power more efficiently with reduced fuel consumption.
The sensor is located on the engine in two versions: on an 8-valve engine it is installed on the cylinder head, and on a 16-valve engine it is installed on the side of the drive camshaft in the area of the generator. It can be easily found and dismantled without visiting a car dealership, although the second option will require more effort and skills.
What are the errors that determine the malfunction of this mechanism?
Error code - 0340
A fairly common occurrence is when the “meat grinder” light on the dashboard (check engine) lights up. This process appears like this: when you start the engine, the starter works for a few seconds, and then phase sensor error 0340 is displayed. The thing is that when starting the car, the electronic engine control unit waits for a certain signal from the phase sensor. If it is absent, the control unit does not send an impulse to the ignition system and fuel supply system. Consequently, the engine does not start, and the engine control lamp comes on, indicating “error 0340” on the VAZ 2114. You can diagnose the breakdown using the car’s on-board computer, or contact a specialized service center.
Symptoms of this problem:
- Increased fuel consumption.
- Difficulty starting the engine.
- Perceptible noise when turning on the ignition key.
Error code - 0343
Indicates a high level of the regulator pulse; this error in the VAZ 2114 phase sensor is less common than the first, and it is directly related to a malfunction of the device itself. The problem is solved by completely replacing the unit; it does not require diagnostics or visits to specialized salons. Error 0343 may be associated with simple oxidation of the wires on the mechanism, which need to be cleaned and their integrity checked.
Attention: there should be 12V at the mechanism terminal and at pin A, and 0V at the rest.
An error in the phase sensor can be caused by a malfunction of the crankshaft position sensor, it is also possible that the timing belt has slipped onto a tooth, the key of the generator belt pulley has been turned out, the crankshaft gear has become loose, wear has occurred on the upper and lower gears. As you can see, there can be many clues; the main thing is to correctly diagnose and effectively fix the problem.
Signs of a malfunction of the phase sensor on the VAZ 2114 associated with this error may be:
- deterioration in speed gain when accelerating a car;
- problems in engine operation, when starting the unit;
- The starter spins for 4 seconds when starting and the check light comes on;
- diagnostic mode failure;
- exhaust gases become transparent, the level of carbon dioxide emissions increases.
Attention: the “Check Engine” control signal (a light on the instrument panel that indicates a malfunction in the engine control system), with a working engine, should go out 0.6 seconds after starting. This is quite enough for the diagnostic system to state that everything is in order.
If the light continues to light, then there is a malfunction, and the error on the VAZ 2114 is an exact confirmation of this. It can be identified using a professional scanner at a service station or “with your own efforts.” We are talking about a superficial diagnosis of the cause, which can give an idea of the approximate identification of a product malfunction. What to do next is up to the car owner to decide; you can replace the sensor with a new one and get rid of all “instrument errors”, and you can also do a general cleaning of the mechanism wires, completely rinse the entire sensor in a special liquid.
Attention: there is such a situation - I changed the sensor, and after a few hours the light comes on again. This problem can arise when refueling with low-quality fuel, or the mechanism is incorrectly installed and requires professional intervention from specialists! You can also get caught in a marriage, and this happens. It is necessary to do initialization after changing the sensor in order to avoid such a problem.
If the car is on the road and error 0343 or 0340 appears, then the following option can be used as a temporary solution to “treat the problem”: rotate the sensor a few degrees around its axis, and then securely fasten it again.
This method will help regulate the fuel supply in the correct mode and reduce fuel consumption when driving the car.
If symptoms of a malfunction of the camshaft position sensor are detected, it is necessary to visually check the mechanism. There may be a problem with one of the following:
- external damage;
- condensation has formed or deposits have formed on the contacts;
- The integrity of the electrical wiring near the unit has been damaged.
If everything is in order, then it is necessary to dismantle the device. You can make the replacement yourself, without visiting a service center.
The cost of a new camshaft sensor for the VAZ family is about 10 (600 rubles) dollars.
Have a good trip and pleasant fellow travelers!
Modern injection and diesel engines use control systems with many sensors that monitor dozens of parameters. Among the sensors, a special place is occupied by the phase sensor, or camshaft position sensor. Read about the functions, design and operation of this sensor in the article.
What is a phase sensor
(DF) or camshaft position sensor (CPS) is a sensor in the control system of injection gasoline and diesel engines that monitors the position of the gas distribution mechanism. With the help of DF, the beginning of the engine operating cycle is determined by its first cylinder (when TDC is reached) and a phased injection system is implemented. This sensor is functionally connected to the crankshaft position sensor (CPS) - the electronic engine management system uses the readings of both sensors and, based on this, generates pulses for fuel injection and ignition in each cylinder.
DF are used only on gasoline engines with distributed phased injection and on some types of diesel engines. And it is thanks to the sensor that the principle of phased injection itself is most easily implemented, that is, fuel injection and ignition for each cylinder depending on the engine operating mode. In carburetor engines, there is no need for a DF, since the fuel-air mixture is supplied to the cylinders through a common manifold, and the ignition is controlled using a distributor or a crankshaft position sensor.
DF is also used on engines with a variable valve timing system. In this case, separate sensors are used for the camshafts that control the intake and exhaust valves, as well as more complex control systems and their operating algorithms.
Phase sensor design
Currently, DFs based on the Hall effect are used - the appearance of a potential difference in a semiconductor wafer through which a direct current flows when it is placed in a magnetic field. Hall effect sensors are quite simple to implement. The basis is a square or rectangular semiconductor plate, to the four sides of which contacts are connected - two input, for supplying direct current, and two output, for receiving a signal. For convenience, this design is made in the form of a microcircuit, which is installed in the sensor housing along with a magnet and other parts.
There are two design types of phase sensors:
Slotted;
- End (rod).
Slot sensor
End sensor
The slot phase sensor is U-shaped; a camshaft reference (marker) passes through its section. The sensor body is divided into two halves, one contains a permanent magnet, the second contains a sensitive element, both parts contain specially shaped magnetic circuits that ensure a change in the magnetic field when passing the benchmark.
The end sensor has a cylindrical shape, the camshaft reference passes in front of its end. In this sensor, the sensitive element is located at the end, above it there is a permanent magnet and magnetic circuits.
It should be noted here that the camshaft position sensor is integral, that is, it combines the sensing element described above, which generates the signal, and a secondary signal converter, which amplifies the signal and converts it into a form convenient for processing by the electronic control system. The converter is usually built directly into the sensor, which greatly simplifies installation and configuration of the entire system.
Operating principle of the phase sensor
Works in tandem with a drive disc mounted on the camshaft. This disk has a reference point of one design or another, which, during engine operation, passes in front of the sensor or in its gap. When the reference point passes in front of the sensor, it closes the magnetic lines coming out of it, which leads to a change in the magnetic field crossing the sensitive element. As a result, an electrical pulse is generated in the Hall sensor, which is amplified and modified by the converter, and fed to the electronic engine control unit.
For slot and end sensors, drive disks of different designs are used. A disk with an air gap works in tandem with slot sensors - a control pulse is formed when passing this gap. A disk with teeth or short reference points works in tandem with an end sensor - a control pulse is generated when passing the reference point.
In injection engines, the master disk and phase sensor are installed in such a way that the pulse is formed when the 1st cylinder passes its top dead center. At the same time, the control system receives information from the DPKV, and based on the readings of both sensors, it sends signals to fuel injection and ignition in the order of cylinder operation. DF and DPKV allow you to quickly monitor changes in crankshaft speed and engine operating mode, and ensure timely fuel injection and ignition operation.
In diesel engines, the system works in a similar way, but with one feature - the position of the piston is monitored separately for each cylinder. This is achieved by modernizing the master disk - adding main and auxiliary benchmarks of various widths. During operation, the engine control system uses these benchmarks to determine which cylinder has reached TDC, and based on this information sends control pulses to the injectors.
The operation of the engine is strictly tied to the phase sensor, so a malfunction of the sensor has a negative impact on the functioning of the power unit. If the DF breaks down or is switched off, the engine is forced into paraphase fuel injection mode controlled according to the readings of the crankshaft sensor. Without a camshaft sensor, the ability to monitor the beginning of the engine operating cycle is lost, so in this mode, each injector forcibly injects half the dose of fuel twice in one cycle. This ensures that a fuel-air mixture is formed in each cylinder, however, in this mode, fuel consumption increases and the quality of engine operation decreases; it often operates unstably and intermittently.
When the DF fails, the Check Engine indicator on the dashboard lights up and a corresponding error code is issued. In this case, it is necessary to replace the sensor and perform the necessary adjustments to the electronic engine management system. With normal functioning of the sensor, the most efficient operation of the engine is ensured in all modes and under all conditions.
If the camshaft position sensor fails on a VAZ 2114, one of the errors will definitely appear (0340 or 0343). You can check the device using a tester. Please note that different types of sensors are installed on 8- and 16-valve engines. There are also differences in diagnostics.
Test algorithm for an 8-valve engine:
- Apply power to pin “E” of the device.
- At the signal “E”, measure the voltage - its value should be about 0.9 Volts.
- Apply a metal object (such as a screwdriver) to the sensing element of the sensor.
- When the voltage decreases to 0.4 Volts, we can say that the device is fully operational. If it is zero or has not changed, there is a breakdown of the device.
Algorithm for checking the DF on a 16-valve engine:
- Connect power to terminal “E”.
- There should be a voltage of about 0.4 Volts on the signal wire of the VAZ 2114 “V” camshaft sensor.
- Carrying out operations similar to those described above, it is necessary to measure the voltage. If the phase sensor is working properly, it will increase to 0.9 Volts.
DIY device replacement
The device is located in the cylinder block, not far from the air filter. The replacement sequence is as follows:
- Open the hood, disconnect the battery from the on-board network.
- Disconnect the block with wires from the phase sensor.
- Remove the screw that secures the sensor to the cylinder block.
- Remove DF.
Inspect the device; very often the reason for its non-functioning state is magnetized metal chips that accumulate on the active element. If so, carefully wipe the device and replace it. If there is another breakdown, then it is better to install a new element. Installation is carried out in the reverse order of removal.
At this point, the repair of the VAZ 2114 camshaft position sensor can be considered complete. As you can see, there is nothing complicated about this, but you need to take into account some features. Most importantly, do not use sealants or gaskets during installation. This will cause the engine management system to malfunction.
The Lada Priora phase sensor or camshaft position sensor is a device that is used in a car to determine the initial engine operating cycle and generate a pulse signal.
Using a magnetic field, the sensitive part of the device responds to the rotation of the camshaft in the car and transmits signals to the electronic engine control system. The operation of the sensor directly affects the fuel injection system.
If the prior phase sensor malfunctions, the ECU does not receive a signal from it and rearranges the injection operation into pairwise parallel mode. As a result, you lose all the benefits of the phased fuel injection system, which directly affects increased fuel consumption, incorrect engine operation and loss of power.
Where is the Priora phase sensor located?
The location and type of mounting of the sensor depends on the type of engine.
So, on the 8-valve Lada Priora engine, the device is located on the gearbox side, at the end of the cylinder head. 
In 16-valve Priora engines, on the contrary, the sensor is installed where the shaft gears are located. The device is attached to the block head using two bolts. This location of the phase sensor on the prior gives rise to many problems when replacing it in the future. 
How to check the Priora phase sensor
In order to identify malfunctions in the operation of the device, you need to pay attention to the following signs:
- the appearance of the “Check Engine” indicator on the instrument panel;
- identification of error codes 0343, 0340 when connecting an on-board computer or diagnostic device;
- noticeable increase in fuel consumption;
- regular, unstable engine operation;
- general deterioration in vehicle dynamics (reduction in engine power).
Now about diagnostic methods.
For a 16 valve engine, the test is carried out using a conventional multimeter. For this you will need:
Now let's talk about how to dismantle the device itself to determine the position of the camshaft.
Due to the fact that the part is located in a hard-to-reach place, there are certain inconveniences when dismantling it. We will look at the fastest replacement method.
So let's get started:
How not to make a mistake with your choice
In order to purchase a Priora phase sensor and not run into a fake part, you need to know basic ways to check it. We will consider one of the methods.
Let's say you went to an auto parts store and chose a product that visually inspires you with confidence. Take and remove the device from the packaging, take out a regular car key (previously removed from the common keychain) from the ignition switch of your Priora and lean it against the measuring part of the device itself (where there is a technical slot). As a result, it should be magnetized to the sensor and firmly held on it.
Here is such a simple but effective way of preliminary verification.
“Important: Remember that the design of the 16 valve prior phase sensor is different from the eight valve model.”
The phase sensor (PPV) is one of the most critical elements that ensures optimal operation of the internal combustion engine. Its main purpose is to analyze the angular position of the camshaft in a certain time period. The information received from it is needed for the operation of the ignition and fuel injection mechanisms. Having this data, the car ensures coordinated operation of the camshaft, taking into account the placement of the cylinders in the engine, which allows the supply of gasoline to a specific cylinder and ignition of the fuel-air mixture.
Symptoms of a problem
If you have the following symptoms, then the phase sensor (df) is most likely faulty.
When starting the engine, the starter spins for 3-4 seconds, then the engine starts and the check engine lights up. In this case, during startup, the computer waits for readings from the phase sensor, does not wait and switches to engine operating mode relying on the ignition system (according to DPKV).
Increased gasoline consumption. (Also read: Reasons for high fuel consumption on VAZ)
Self-diagnosis mode failures.
Reduced engine dynamics. (the reason may also be the mass air flow sensor and low engine compression)
Replacement
On these engines, the sensor is located at the end, in the rear cover of the timing belt. Replacing the camshaft sensor on a VAZ 2110, VAZ 2112 is not at all complicated: use a “ten” key to unscrew the two bolts and remove it from the cover.
How to check
1. Set the voltage at voltmeter V1 on the power supply unit “E” to 13.5±0.5V, the voltage at contact “B” of the sensor must be at least 0.9.
2. Bring a steel plate made of soft magnetic material to the end of the sensor, as shown in the figure, placing it in the slot of the housing. The sensor should operate, which is determined by the change in voltage at contact “B” of the sensor. When the sensor is triggered, the voltage at contact “B” should be no more than 0.4V.
3. Remove the steel plate, and the voltage at contact “B” of the sensor should change to a value of at least 0.9
