Check engine light came on after car wouldn't start

Check engine light came on after car wouldn't start - ENGINE LIGHT ON: WHEN TO WORRY?

The engine light is the one that scares motorists the most when it comes on.

Below you will find a complete guide to the engine light on: what it is, why it comes on, what to do and what situations to worry about.

WHAT IS THE ENGINE LIGHT?

The engine warning light - also known as the engine failure warning light - is located on the dashboard and mimics the shape of an engine.

WHO IS THE SPY?

The engine warning light belongs to the group of yellow warning lights (as it emits an amber yellow light), those that come on when the car is started to carry out system checks and that signal the presence of a defect or problem that requires a check or an intervention.

WHEN SHOULD I NOT WORRY ABOUT THE ENGINE LIGHT ON?

Under normal conditions it comes on every time the ignition key is turned and if it goes out as soon as the engine is started, there is no need to worry.

This ignition simply means that the system - which has the task of monitoring the efficiency of the system, reporting an increase in emissions and communicating the need to replace deteriorated components - is carrying out a diagnosis of the components related to the emissions present. on the car.

WHAT HAPPENS IF THE ENGINE LIGHT STAYS ON AFTER STARTING THE ENGINE?

It depends on whether the warning light flashes or not: in both cases it is advisable to take the car to the mechanic as soon as possible.

THE ENGINE LIGHT IS ON BUT NOT FLASHING. WHAT DOES IT MEAN?

If the warning light stays on or comes on while driving, it means that there are malfunctions in the injection system. Problems in the fuel / ignition system can cause high exhaust emissions, possible loss of performance, poor driveability and high fuel consumption.

THE ENGINE LIGHT IS ON, IT DOESN'T FLASH BUT THE CAR IS OK. WHAT DOES IT MEAN?

This is probably the dirty EGR valve.

WHAT IS THE EGR VALVE?

A valve that has the function of recirculating a part of the exhaust gases to send them back to the intake manifold. This lowers the temperature in the cylinders and the temperature in the exhaust gases and consequently reduces the NOx emissions (nitrogen oxides). On diesel cars that travel a few kilometers, the EGR valve tends to get dirty.

HOW DO I SOLVE THE PROBLEM OF A DIRTY EGR VALVE?

Cleaning it with specific chemicals or - when that's not enough - replacing it.

WHAT TO DO WHEN THE LIGHT IS ON BUT NOT FLASHING?

You can continue driving without requiring heavy efforts from the engine or high speeds. Since prolonged use of the car with the warning light on steady can cause damage, you must go to a workshop as soon as possible.

THE ENGINE LIGHT FLASHES: WHAT DOES IT MEAN?

It means there are more serious problems to deal with, such as possible damage to the catalyst. The lambda probe could communicate incorrect data to the control unit and cause serious damage to the engine due to an incorrect air / fuel ratio injected into the cylinders.

WHAT IS THE LAMBDA PROBE?

The lambda probe has the task of detecting the residual oxygen content in the exhaust gas and of sending an electrical signal to the engine control unit to regulate the composition of the mixture.

WHY DOES THE LAMBDA PROBE FAIL?

Lambda probe failures have several causes: internal and external short circuits, missing ground / power supply, overheating, deposits / fouling, mechanical damage, and use of leaded fuel / additives.

WHAT DAMAGE DOES A DEFECTIVE LAMBDA PROBE CAUSE BESIDES THE IGNITION OF THE ENGINE LIGHT?

Increased fuel consumption and exhaust emissions and reduced engine power. What should I do if the light flashes? Release the accelerator pedal reaching low speeds until the warning light stops flashing and continue driving at a moderate pace to avoid conditions that could cause further flashing.

Engine failure warning light on, what to do now?

For several years now, machines have been communicating in an increasingly sophisticated way, using lights and sensors to continuously diagnose the vehicle and all its main components.

With the introduction of new anti-pollution regulations in 2012, the cars were equipped with a series of technologies and systems to reduce harmful emissions into the atmosphere. To check them there are special indicators, including the engine failure light, a yellow or orange light that depicts the stylized image of an engine.

These warning lights are connected to the control unit, to warn the driver if a problem or a fault of various kinds should arise.

A fairly common situation is the engine failure light on, a condition that indicates the presence of a more or less serious fault, for example in the catalyst or in the injection system. Let's see how to intervene in the right way, to understand what to do when the engine warning light stays on or suddenly starts flashing once the vehicle is started.

Fixed engine failure warning light: what does it mean?

The on-board instruments of modern cars have become increasingly technological, with many alerts that allow you to monitor all the main features of the car. When the ignition key is turned, a series of warning lights usually come on, which should then go out when the vehicle is started. In some cases they may remain on for a few seconds, after which it is essential to be able to visualize a clear and clean picture.

If a light stays on, it means that there is a problem, malfunction or inefficiency in one of the parts controlled by the on-board system.

One of the most common situations is the engine failure light on, an alarm that indicates a generic problem and is represented by the engine fault symbol. With the yellow engine light steady and continuous, it means that the fault could be serious, so it is essential to contact a specialized workshop as soon as possible to have the car checked and avoid serious breakdowns or drops in performance.

The causes of the engine system failure can be different:

a malfunction in the injection system;

an anomaly in the accelerator pedal;

a situation to be verified related to the exhaust system.

It is not uncommon for the problem of the solid yellow engine warning light to be due to dirty fuel, especially if it occurs after a refueling. This happens especially when the tank is empty, since the new liquid introduced by the operator will move the sediments deposited on the bottom.

Engine failure warning light on and intermittent

If the engine trouble light remains on, but with an intermittent ignition movement, the cause may be in the catalyst.

This is a more serious situation than the previous ones, so it is even more important to consult a professional immediately when you see the image of the stylized engine in the dashboard, avoiding continuing to drive for hours or days before subjecting the car to a check.

The catalyst is an anti-pollution device, used in older car models before it was replaced by particulate filters (FAP).

Thanks to a series of chemical reactions, this component applied to the exhaust system attracts harmful particles released by the combustion of the fuel, so that they are not released into the atmosphere. The sensors located in this system communicate fundamental data to the control unit, therefore an incorrect reading could cause various anomalies.

The main risk is an increase in consumption and polluting emissions, an aspect that may not seem very serious, however it involves a rather significant loss of efficiency. In addition, the malfunction also endangers the operation of the vehicle, since the control unit may decide that the parameters are excessive and in fact compromise the vehicle's pace. 

check engine light came on after car wouldn't start with an incorrect calculation of the air / fuel mixture it is possible that the vehicle stops completely, forcing you to call the roadside assistance and bear the costs of the service.

Iklan Atas Artikel

Iklan Tengah Artikel 1

Iklan Tengah Artikel 2

Iklan Bawah Artikel