The car battery fault light is on, it can start normally, and the meter is more than 14V, what s goi

The battery light is lit to indicate that the generator system may be faulty. 1.It is recommended to use a multimeter to check whether the generator generates electricity in the idle state, focusing on checking whether the other excitation state is normal. 2.If the generator is generating electricity normally, it is recommended to check the generator indicator circuit.

You check the generator charging indicator system, change the generator or change the meter to try it.

There is a problem.

Precursor phenomenon of battery failure:It can be activated every time it is activated, but the meter or system will be accompanied by a warning sound at the moment of activation.

Insufficient voltage performance:One is remote control door opening, instrument, radio, etc.; Low-current electrical equipment can be used normally; The starting motor does not work, and there is a clicking sound of the motor. The other is that the motor works normally, but it does not start.

The reason is that the battery voltage is too low, which causes the module to fail to operate normally, and the system cannot be unlocked.

Car battery precautions.

It should be noted that if the vehicle is not left open for a long time, it will be difficult to start. Even if the vehicle is not in use, it should be turned on every few days to let the battery be charged and ensure that the battery is always in a fully charged state.

Cars often drive short distances, start and stop, which will cause the car battery to be in a state of insufficient charging for a long time, shortening the service life. Driving at a steady speed for 20-30 minutes on the highway can give the car battery enough time to recharge.

It is best to decode, the engine indicator light is on, indicating that there is a fault code, and there may be a failure that does not affect the normal driving of zhi, but will increase fuel consumption, the fault is objective, and it is best to pay attention to it.

The engine fault light is generally caused by the fuel emission system, you start and extinguish the vehicle when the fault light is on, start and extinguish the car three times after starting the vehicle, you observe whether the fault light is still lit, or it is still lit, you need to go to the store in time to check the fault code, to see whether it is the problem of the engine or the sensor failure, or it may be an occasional failure, you can not go to the store in time to check.

Answer: The reason why the engine fault light is on after the loss of power may be the fault formed after the battery is lost**, you can go to the 4S shop to eliminate it first, if the fault code still jumps out later, it needs to be repaired.

The engine fault light is the most common light in actual use, and if the engine fault light is on, it can be continued in most cases. However, when the oil pressure lamp, water temperature warning lamp, handbrake lamp, and tire pressure lamp are on, it is necessary to stop and check immediately, and only if there is no abnormality can it continue to open.

When the engine fault light is on, it means that the engine parameters have changed, and excessive carbon deposition is a common cause of engine parameter changes. If this problem is not solved, the combustion state of the engine will never be adjusted to the normal state, and the engine fault light will of course stay on and will not disappear automatically.

Battery introduction: Battery refers to a battery that can continue to be used after being charged. There are lead-acid batteries, nickel-iron batteries and nickel-cadmium batteries. The positive electrode of the lead-acid battery is lead dioxide, the negative electrode is lead, and the electrolyte is a dilute sulfuric acid solution.

When discharging (using), the positive and negative electrodes react with sulfuric acid to form lead sulfate, and when the concentration of sulfuric acid solution drops to a certain level, it must be charged. When charging with an external power source, the electrode and solution can be restored to their original state, and they can be used again after charging.

It is not recommended to continue driving the vehicle after the battery light is on, because the power generation system of the vehicle is faulty, and if you continue to drive, the power consumption of each part of the vehicle will be insufficient, and the vehicle will automatically wash and break down. Affect the normal operation of the vehicle. The correct way is to pull over the vehicle, call the rescue company, and tow the vehicle to the maintenance point.

There are many reasons why an engine failure light can come on, but the most common cause is a malfunction of the sensors around the engine. After the engine fault light is on, a professional diagnostic computer should be used to read the fault code, so that the cause and location of the fault can be quickly determined.

A car is not just a machine, there are many sensors and electronic components on the car.

Without these sensors, the car would not function properly.

There are many sensors around the car engine, such as knock sensor, water temperature sensor, camshaft position sensor, crankshaft position sensor, oil pressure sensor, intake air temperature sensor, air flow sensor, etc.

Ask the generator.

The engine fault light is lit to indicate a malfunction in the engine exhaust system. If it turns off after a few seconds of starting the engine, it means that it is a normal system self-test. If it is always on, there is a possibility that the exhaust system is malfunctioning.

If it flashes and flashes, it means that the engine is lacking fire and has damaged the catalytic converter.

Ask the generator fault light, not the engine.

1. The battery wiring is loose, and the positive and negative electrodes of the battery wiring need to be checked for looseness and serious oxidation, resulting in poor contact. The positive and negative electrodes of the battery need to be cleaned and tightened;

2. The generator belt is loose, check whether the generator belt is loose or slippery. If there is looseness or slippage, the battery cannot be charged, and the battery will be lit up if it is faulty, and it needs to be checked or repaired in 4s;

3. Charging circuit system failure, generator charging main line, generator charging main pile head to low-voltage battery positive pile head line break or poor contact and other faults.

Hands tremble, hands tremble. Old typos.

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Hello, the car power loss or the system voltage is low, the computer will ask to turn on the fault light to start the fault light should have a historical fault code, it is recommended to go to the 4S shop or car repair shop with a decoder can directly clear this fault code, at this time the engine fault light will not be on again. The reasons for the battery power loss caused by the failure of the non-generator and charging circuit can be explained as follows:1

The electrolyte (dilute sulfuric acid) in the subaru battery gradually evaporates when the battery temperature rises, especially in summer. Unscrew the four sealing plugs on the battery and take a look at it, there are anti-sputter ventilation holes on them, which are used to exhaust the steam generated by the increase in temperature inside the battery. 2.

As the electrolyte decreases, the battery's power storage capacity gradually decreases. This situation occurs in summer, as long as the electrolyte is not particularly short, the phenomenon of battery power loss will not be particularly obvious, because the temperature is very high in summer, the electrode discharge reaction of the battery is very active, and the loss of electricity is not felt. The same situation occurs under low temperature conditions, especially in late autumn and winter, especially when the cold car is started for a long time, or when driving at low speed, the battery is not charged enough, or even will not be charged but is discharged in one direction, the battery temperature is very low, and the electrode discharge reaction is inactive, there will be an obvious power loss, and even the battery energy storage is exhausted and there is no electricity.

This is also the main reason why the battery frequently loses power in autumn and winter and the car cannot start. In fact, this battery does not need to be replaced, as long as the battery replenishment liquid is added to the battery, so that the electrolyte height in the battery reaches the specified height. 3.

Traditional batteries have the benefits of traditional batteries, as long as the electrolyte does not lose too much, the battery will quickly return to normal after replenishment. The maintenance-free battery is convenient, but in the case of long-term bumpy driving of the vehicle, the electrolyte in the battery in a jelly state and the electrode will be peeled off. Let me tell you a trick to fix the "power loss" fault of the maintenance-free battery:

Take a syringe, suck some conductive liquids such as dilute sulfuric acid, drive it along the seam between the electrode and the battery, pry open the seam without seams, and then close the seam with sealant to use it again. At least stick to the pit and drive the car to the pits. @2019

There should be three that will light up. The cause is insufficient voltage and voltage fluctuations.

The fault of the battery light is as follows:

1. Caused by battery aging.

Because after the aging of the battery, its storage and discharge capacity will drop sharply, which will cause the meter to appear a charging indicator warning.

Solution: Replace the battery with a new one. However, it should be noted that the positive and negative poles cannot be reversed during the replacement process, otherwise part of the control module may be burned.

In addition, after replacing the battery, the charging indicator is still always on, for this kind of phenomenon, only need to match the newly replaced battery to solve.

2. Caused by generator damage.

When it is damaged, the vehicle will no longer generate electricity, and the ECU will light up the charging indicator when it detects that the generator is not generating electricity, because the power used by the vehicle comes from the battery.

Solution: It is recommended to replace the generator with a new one as soon as possible to avoid damage to the car battery after driving for a long time.

3. The belt that drives the generator to run is broken.

This fault will also cause the vehicle to appear charging indicator, because most models still use the belt to drive the generator, if the belt breaks, it is equivalent to the generator cannot work, and it will also be accompanied by heavy steering, no brakes, stalling and other fault phenomena.

Solution: Replace the generator belt and reinstall it to solve the problem.

4. The current sensor on the battery.

Damage. This sensor will detect the direction of the current on the battery, and calculate the capacity and working state of the battery through the direction of the current, if the current goes in the direction of the battery, it means that the battery is now charging, if the current goes in the opposite direction, it means that the battery is discharging. If it is damaged, it will cause the current signal to not be detected, resulting in a fault light to be on.

Solution: Replace the sensor with a new one.

Caused by loose cables, charging circuits, battery problems, etc.

The battery fault light may be lit, there may be a problem with the battery, the battery is aging, and the life of the battery is generally about 3 years. After the battery is used for a long time, the internal vulcanization of the battery, the insufficient capacity of the battery leads to serious power loss, the internal grid of the battery, the electrode short circuit and other reasons, it is recommended to replace the battery in time.

Loose battery cable or charging circuit problem. It should be further checked whether the positive and negative connection wires of the battery are loose, and whether the charging line is aged and short-circuited.

There are problems with the generator, such as damage to the voltage regulator, breakdown damage to the rectifier, wear of the carbon brush to the limit position, short circuit in the stator coil or rotor coil, etc. The generator should be replaced in time to solve the problem.

Generator belt problems, such as the belt is too loose resulting in insufficient speed, the phenomenon of losing rotation, belt aging, the general generator belt should be replaced in 100,000 kilometers or about 3 years. The generator belt should be adjusted or replaced in time.

The car battery can be said to be a component with a relatively high failure rate, and the car battery fault lamp mentioned today is used to reflect whether there is a problem with the battery alone. Therefore, when the battery fault light is on, there is undoubtedly an abnormality. So, what is the reason for the car battery failure light, and what is the reason for the battery indicator light, let's list the influencing factors.

The battery is depletedIf the car battery light is on, it is likely that the battery has a power loss, especially for a car that has been useless for a long time, and it must be normal for there to be a power loss. But don't worry too much, as long as the car is started, the engine will directly drive the generator through the belt, and then the electricity generated will be rectified and stabilized to directly charge the car battery. Of course, we can also use the charger to charge, first connect the positive pole of the charger to the positive pole of the battery, and connect the negative pole of the charger to the negative pole of the battery, and then press the charging button to charge.

Severe vulcanizationThere is also a situation that when the battery is used for a period of time, a lot of sulfide salts will naturally accumulate on the plate, which will affect the normal operation of the battery (the battery light is on), and it needs to be removed in time to be solved. First of all, the current within the 5h rate of the high current is used to fully charge the battery power. Then, when the liquid temperature does not exceed 40 degrees, a discharge of 30 percent is carried out, so that the slight sulfide salt on the surface of the plate is washed out, so that it is desorbed and dissolved and converted into active substance.

Then, following this process for three or four cycles, the vulcanization of the car battery can be repaired.

In order to prevent lack of judgment, novices can go to Ma Yun's house to buy a cigarette lighter adapter that can test the battery voltage, so that the life of the battery can be monitored at any time.

Or your battery leakage, aging, no power storage capacity, etc. will appear this fault lamp, it is recommended that you take it to the repair shop for testing, the cost of replacing a battery is not very high, I hope to help you!