Free Car Diagnostic

Showing posts with label Warning Light Diagnostic. Show all posts
Showing posts with label Warning Light Diagnostic. Show all posts
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Battery Light Keeps Coming On

Battery Light Keeps Coming On

If battery warning light keeps coming on while driving, it indicates a slipping alternator belt or failing alternator.

The reason why battery light keeps coming on

(1) Slipping alternator belt
(2) Failing alternator

First, let's get some background information. An alternator is a belt-driven device that does two things,

1) it recharges the battery and,
2) it provides electricity to accessories while the engine is running.

So, if the battery light is on, it means the alternator isn't generating any electricity to,
1) charge the battery or,
2) power the accessories.

With that said, we have the following two possibilities...

Slipping Alternator Belt - If the belt occasionally slips, the alternator won't generate any electricity during the slippage. This will trigger the battery light to flicker.

Failing Alternator - If the alternator occasionally fails/dies, it won't (of course) generate any electricity during the failure. This will trigger the battery light to flicker. Although rare, it's possible that wire coming off the alternator may have become loose. If this is the case, each time the loose wire breaks contact with the alternator, the battery light will come on.

Battery Light Keeps Coming On

What to do?
Please take the car to a reputable car repair shop and ask the mechanic to inspect the alternator and its belt. Hopefully, all you'll need is to have the belt adjusted or replaced.

Have this problem taken care of soon. If you don't, you can be sure that one day the battery light won't just flicker but rather it'll come on steady. When that happens, you will have roughly 20 minutes of driving left before the engine conks out.

If the mechanic says you need a new alternator, don't be surprised if tells you that he'll have to replace something called the "voltage regulator" as well. Why? Because, on many vehicles, its necessary to replace both the alternator and voltage regulator at the same time.



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Temperature Gauge Reads Hot During Traffic

Temperature Gauge Reads Hot During Traffic

When temperature gauge reads hot during traffic it means that there is something wrong with the fan. This particular problem suggests that there is something wrong with the fan. You see the main purpose of the fan is to keep the engine cool when the vehicle either moving slowly or stop such as in prolonged slow traffic.

The reason why temperature gauge reads hot during the traffic

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Temperature Reads Hot After Engine Start


Temperature Reads Hot After Engine Start

If the temperature reads hot after the engine is started the possible reason is a lack of coolant, collapse radiator hose, bad water pump, or a bad thermostat.

Possible reasons why temperature reads hot after engine start


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Battery Light On and Off While Driving

The battery warning light indicator on dashboard is occasionally on and off while driving the possible reason is that the alternator is failing or the alternator belt is slipping.


Possible cause of battery light that flickers
1)The alternator belt is slipping.
2)The alternator itself is failing.

When the battery dashboard warning lights indicator flickers while the car is running there are two possibilities that causing this kind car trouble, as mentioned above it can cause by the slipping alternator belt or a failing alternator. The alternator is the device that provides electricity to the car battery, it is connected from the engine using an alternator belt, when the engine runs some of the power will be transferred to the alternator to make it runs and create electricity so that the battery will charge, aside from providing charges to the battery the alternator is also the one that provides electrical power to all your car accessories like the radio, air con, lights, etc. while the engine is running. Now, if the battery warning light indicator located on the instrument panel is lit “ON” then it means that the alternator is not generating electricity that the car accessories are needed.

Since the problem is the battery warning lights only flickers, sometimes on and sometimes off, then the problem is intermittently occurring which means that the alternator is sometimes generating electricity and sometimes not generating electricity or somewhat failing, during the time the alternator fails it cannot generates electricity to the battery warning lights is always on.

Read also: Brake Warning Lights Came On Steadily While Driving

Also when the alternator belt is slipping the alternator cannot generates electricity, as mentioned above, the alternator is connected to the engine using the alternator belt, now if there is a problem on the alternator belt, for example, if the belt is broken the alternator will stop running and you can see the battery warning lights steadily ON, however since the warning lights only flicker this means that the belt sometimes fine and sometimes not which is usually a symptom of slipping belt, every time the alternator belt slip the alternator stop generating electricity this triggers the battery warning lights indicator on the dashboard to came “ON”.

How to fix for the flickering battery warning lights

Bring your car to a shop and ask the mechanic to check the alternator. More often than usual the belt is only needed some adjustment to fix it. But if the belt is no problem then it is the alternator that causes the problem, probably it is failing and it is necessary to replace the alternator. Have it fix soon because you may not be able to drive the car when the alternator failed completely.


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Radiator Boils Over when the Engine is Semi-hot

The radiator boils over even though the engine is semi-hot. The two possible reason is causing this problem, first is a leaking radiator cap, second is a wrong anti-freeze/water ratio.

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Temperature Gauge Reads Hot in Prolonged Traffic

The temperature gauge of the car will reads hot when stuck on traffic. The possible cause of the problem  is a faulty fan motor, sensor or switch. Other reason is a slipping fan belt.

Temperature Gauge that Reads Hot Possible Causes
Faulty Fan Motor, Sensor or Switch
If the car is equipped with an electric fan then the possible cause is that the motor, sensor, or the switch is faulty.

The purpose of the fan is cool down the engine when the car is stopped or moving at low speed such as during traffic. Since your car is equipped with an electric fan those three parts mentioned above is possible cause of the problem. When the fan motor is faulty the fan will not function to cool the engine.

The purpose of the coolant sensor is to measure the temperature of the coolant, when the temperature is high the fan will be triggered to cool down the engine, now if the sensor is faulty the fan will not be triggered and the engine won’t cool.

The purpose of the fan switch is turn on the fan, if the switch is faulty the fan will also not triggered.

Bring the car to a reputable car shop and ask the mechanic to inspect the electric fan, explain to the mechanic about your diagnosis and repair or replace the faulty parts if necessary.

Slipping Fan Belt or Faulty Fan Clutch

This is possible only when your car uses a belt driven fan. When the fan is belt driven, the belt might be slipping. If this is the case the fan will not turn as fast as it should be, this will cause the engine to become too hot and the temperature gauge will reads hot. Same as when the fan clutch is faulty, fan clutch is a mechanical device that causes the fan to engage when the engine temperature is getting hot and also disengaged when engine temperature becomes low or within the engine operating temperature. If the fan clutch is faulty the fan will not spin thus making the engine not to cool down when the engine temperature is hot.

Turn off the engine, and then open the hood of your car. Inspect the fan belt if indeed it is loose use your finger to press down the middle of the belt. If the belt is tight the belt will not go down more than a half inch. If the belt goes down half inch then the belt is loose. Tighten the belt to correct the problem.

If the belt is tight then the problem is the fan clutch, in this case bring the car to a reputable car shop and ask the mechanic to check the fan clutch and replace if necessary.
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Low Oil Light Flashing Occasionally While Driving

Low Oil Light Flashing
Low Oil Light Flashing

The oil warning lights indicator on the dashboard flickers occasionally while driving your car this is because the engine oil level is low, a wrong viscosity of the oil is used, the oil pan is partly clogged, or a faulty oil pressure sensor.

Anti-lock Brake Light Came On Steadily While Driving

Conditions when car trouble occurs
While driving your car the anti-lock brake warning lights located on the dashboard came on steadily.

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Oil Light On Steadily While Driving

Oil Warning Light Came On Steadily
Oil Warning Light Came On Steadily
The oil light came on steadily while the car is running the possible cause is that the engine oil level is low, the oil pump is faulty, or the oil pressure sensor is faulty.

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Temperature Gauge Read Hot After the Engine Start

The temperature gauge reads hot after the engine is started. Several reasons are causing this such as the radiator lacks coolant, the hose of the radiator is collapsed, the water pump is faulty, or there is a problem with the thermostat.

Possible cause of temperature gauge that reads hot after starting
1) The radiator lacks coolant
2) The radiator hose is collapsed
3) The water pump is faulty
4) The thermostat is faulty

The listed reasons above the first two are the easiest to check. Now the first thing to do is to check the radiator if there is enough coolant in the system. Open the hood and locate the radiator, remove the radiator cap. Make sure that the engine is cold before removing the radiator cap otherwise you may burn yourself. Using a flashlight look down at the radiator fill hole to check the coolant level, the coolant level is said to be enough when the coolant covers the fins inside the radiator. If the coolant did not cover the radiator fins then the coolant inside the radiator is not enough and this causes the temperature gauge to reads hot. To work efficiently the engine cooling system must have enough coolant if the coolant is not enough the engine will heat up too quickly and the temperature gauge will register hot.

If there is enough coolant in the radiator, the next thing to check is the radiator hose. While the hood is opened locate the radiator hose. Refer to the manual if you are having difficulties in finding the radiator hose. Ask a friend to start the engine while you observed the radiator hose, watch the hose until the engine gets hot. Look closely if the hose is collapsing, usually, an old hose or a defective hose behave like there is pinching the hose.

If the radiator hose is collapsing then this causes the temperature gauge to read hot. When the hose is collapsing the coolant will be prevented from flowing in the radiator into the engine. This will cause the coolant to heat up quickly.

If the hose is not collapsing then the possible cause of the problem is a faulty water pump or a faulty thermostat. The water pump is the one that pumps the coolant out of the radiator going inside the engine and back to the radiator. If the water pump is faulty the coolant will not be circulated through the radiator and will get hot and the temperature gauge will read hot.

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Now for the thermostat, the purpose is opposite that of the water pump this is because the thermostat is what keeping the coolant from getting into the radiator when the cold engine is started. Initially, the thermostat is in the closed position. After the engine warms up the thermostat will open to allow the coolant from the engine to reach the radiator. If the thermostat is faulty such as when the thermostat is stuck on the closed position the coolant that surrounds the engine will get hot and the temperature gauge will read hot. 


How to fix the temperature gauge that reads hot after the engine start
Radiator Lacks Coolant
Make a 50/50 mix of anti-freeze and water in an empty container, you can buy anti-freeze fluid at any parts store. During the morning when the engine is cold, remove the radiator cap and pour enough amount of coolant to the radiator, the coolant must cover the fins inside the radiator. Now the problem is why the radiator lacks the amount of coolant, there might be a leak somewhere in the system. Have the cooling system check to make sure there is no leak on the system.

Collapsed Radiator Hose
Just replace the radiator hose with a new one.

Faulty Water Pump or Faulty Thermostat
Bring the car to a car shop then have a mechanic to check the water pump or thermostat to determine which of the two causes the problem. Replace the faulty parts to fix the problem.


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Battery Warning Light Comes On While Driving

Battery Warning Lights
Conditions when car problem occur
The battery light comes on steady while driving.

Possible cause of lit battery warning lights
1) The alternator belt is damage.
2) The alternator is faulty.

Troubleshooting battery warning lights that come on
When your battery warning lights on the dashboard comes on while driving two reasons will cause this, first is the alternator belt is broken and second, the alternator failed. The alternator is being driven by the engine using belts for the purpose of supplying charge on the battery and provides electrical power on all of your car accessories. If the battery light comes on while driving it means that the alternator is not generating electrical power for your car and all the car accessories will draw power to the battery until the battery also losses power. Now why the alternator is not supplying electrical power to the battery and accessories?

What does it mean when the Battery light comes on

What does it mean when the battery light comes on?

Troubleshooting car problem of Battery Light Came on While Driving
When a battery light came on while you drive your car usually it indicates a broken alternator belt or the alternator fails to produce electrical charge for the battery. The alternator is a device that charges the car battery, also it provides electricity to the entire car accessories installed in your car such as lights, radio, etc. while the car engine is running.

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