2023 Author: Erin Ralphs | [email protected]. Last modified: 2023-08-25 03:49
Modern cars are stuffed with all sorts of electronics. On the one hand, this is convenient, since most malfunctions can be determined using the on-board computer, and on the other hand, frightening inscriptions often come out with fault codes in the engine. Error P0102 is a common culprit for failures of VAZ family cars. What this code means and how to fix it, we will tell in the article.
What does error P0102 mean
The operation of the engine is completely subordinate to the commands coming from the car's ECU. By collecting information from different sensors, the controller selects the correct modes for all machine systems. Error code P0102 indicates that the signal coming from the DMRV (mass air flow sensor) has a low voltage. This malfunction can be caused by several reasons:
- Excessively clogged air filter. The amount of air entering the engine is not enough for the sensor to work correctly - this is one of the most common reasons.
- Proximity of high-voltage ignition wires to the MAF. High voltages in adjacent wires can create self-inductive currents in the sensor and cause incorrect signals to be generated.
- DFID pollution.
What is the MAF for
The internal combustion engine runs on a combination of fuel and air. Efficient operation requires a mixture that will burn out in the cylinders almost completely, and for this you need to choose the right ratio.
DMRV, otherwise called the MAF sensor, transmits readings to a computer that selects the exact proportion of air and gasoline corresponding to certain crankshaft speeds.
Undoubtedly, with a P0102 error, the car can continue to drive, but its engine will be unstable.
First, Check Engine lights up on the instrument panel, indicating a problem. In this case, the car may not start well. Instead of steady revs, a cold engine will run erratically and will need to be throttled to keep the engine from stalling.
The error signal may disappear for some time, but later the situation only worsens: failures can occur not only at idle, but also during engine operation under load. For example, during overtaking, when you need to squeeze out the maximum power, the car may start to twitch, not picking up speed. The car may stall on the move as soon as the foot is removed from the gas pedal. All this can lead to an emergency situation onroad.
How to check the sensor
Before you buy a new MAF sensor, you need to make sure that the old one is faulty. First you need to clean the MAF with a special sensor spray. Then see what condition the air filter is in. If necessary, replace. More than half of the time the problem will be fixed.
In order to diagnose the cause of error P0102, do the following:
- Erase error code from ECU.
- Connect a scanner or trip computer to the OBD-II connector and test drive.
- If the error lights up again, then check all potential culprits for its occurrence: filter, connector, wiring harness.
In addition, you need to check the electrical circuit with a multitester and measure the voltage between the contacts of the block.
When the ignition is off, the connector is disconnected from the sensor. Then the ignition is turned on and the voltage is checked between pins 2 - 3, 3 - ground, 3 - 4. Between pins 2 and 3, the voltmeter should show 10 volts, between 3 and 4 - 5 volts, and there should be no voltage between 3 and ground.
After checking, you need to install the resistance between pin 5 and ground. In the normal state, it will be 4 - 6 kOhm. If the measurement data does not correspond to the nominal value, then there is either a break or a short in the wiring. Resistance diagnostics are performed with the power off.ignition.
Only after the previous check can it be concluded that the MAF sensor is malfunctioning.
How to make a replacement yourself
The air mass sensor is located between the air filter and the massive air pipe connected to the intake manifold.
After you have established that the VAZ error P0102 pops up due to the DMRV, you can safely go to the store for a new part. A new sensor costs more than 3,000 rubles and is sold complete with a pipe in which it is installed.
Replacement work is done with the ignition off. First you need to disconnect the block with wires from the sensor. To do this, press the bottom of the chip on the latch and carefully remove the connector. In this case, you need to pull not by the wires, but by the block.
Use a screwdriver to loosen the clamp and remove the rubber tube from the sensor. After that, two M6 bolts are unscrewed from both sides of the DMRV.
After removing the part, you need to look at the markings on the case, because the car industry installs different ECUs on the same models, and it may turn out that a new working sensor will be incompatible with the controller installed on the car.
The sensor is installed in the reverse order of removal. This eliminates error P0102 for Kalina, Priora, Samara - all representatives of the VAZ family with similar injection engines.
A lot depends on how well the air flow sensor works, incl. vehicle power and fuel consumption. How to check the performance of the device?
Probably, every owner of a car with an injection engine has encountered various errors in the operation of this unit. Such a trouble is reported by the corresponding sign on the instrument panel - "engine error". Many will immediately go to the service station for diagnostics, while others will go with this problem. But the third group of people will definitely be interested in the reasons and decoding of the codes
In order for the engine to work confidently in any mode, it is necessary that it receives the optimal composition of the combustible mixture. The engine is not enough fuel alone, it also needs air
DMRV VAZ-2110 (mass air flow sensor) is the most important part of a car, without which no modern injection engine can do, including the engine of the domestic "tens". Many car owners at least once faced with the problem of the internal combustion engine. In many cases, the cause of this is a faulty mass air flow sensor. Today we will talk about its design, and also find out if this part can be repaired if it breaks
The mass air flow sensor (abbreviated as DMRV) is an indispensable device that determines and regulates the supply of the required amount of air to the combustion chamber of the internal combustion engine. Its design necessarily includes a hot-wire anemometer, the main function of which is to measure the costs of the supplied gases. The air flow sensor VAZ-2114 and 2115 is located near the air filter. But regardless of its location, it breaks down the same way, like all modern models of the Volga plant