The modern car is a complex electronic organism, where each node is controlled by dozens of sensors. The driver receives information about the state of the systems through the dashboard, where various symbols light up. Understanding what it means car-wreckIt is often the deciding factor between a scheduled service visit and expensive engine or transmission repairs. Ignoring these signals can lead to complete failure of the units.
The indicators are divided into three main groups by color: green or blue indicates that the system is active and working; yellow or orange warns of a malfunction requiring attention but allowing movement; red signals an emergency that requires immediate stop. Check Engine The most famous, but not the only important symbol. Below we will discuss how to interpret these signals correctly.
Critical Indicators: When to Stop Immediately
Red lights on the dashboard are not just advice, it’s a safety requirement. If the lights go off. pressureThe grease, depicted as an oilseed, means that the pressure in the lubrication system has dropped to a critical level. Movement with a burning red oil indicator even for several hundred meters can lead to a turn of the liners and overhaul of the engine. In such a situation, the engine must be immediately shut down.
⚠️ Attention: Never try to reach a service with a burning red oil pressure indicator or overheating of coolant. This is guaranteed to lead to engine wedge or rupture of the cooling system pipes.
Another critical signal is engine-heatingIt is symbolized by a thermometer immersed in a liquid. The cause may be fan failure, leaking antifreeze or breakage of the thermostat. The red zone also includes the indicator. brake failure (exclamation mark in a circle), which can talk about both the raised handbag and the absence of brake fluid or a drop in pressure in the circuit.
- 🛑 Olive: Critically low oil pressure, risk of engine jamming.
- 🌡️ Thermometer: The temperature of the coolant is above normal, the risk of deformation of the HBC.
- 🛑 Exclamation mark in the circle: Problems with the brake system or the parking brake is on.
- 🔋 Red battery: Failure of the generator, the car only runs on the battery.
The indicator deserves special attention. battery red. It does not light up when the battery is discharged, but when the generator stops producing electricity. The car will continue to move until the battery charge runs out, after which the electronics will turn off, and the engine will stall. At night or in a dense stream, this creates an emergency situation.
Warning signals in yellow and orange
Yellow indicators indicate that one of the systems is not working properly, but there is no direct risk to life right now. The most common is Check Engine (heterogeneous engine). It can catch fire due to poor fuel, lambda probe malfunction, ignition misses, or catalyst problems. Movement is possible, but diagnosis is needed as soon as possible.
System system ABS (anti-lock) and ESP (Transactional stability) also has its own indicators. If only it's on fire. ABSSo the anti-lock system is off, but the normal brakes are working properly. If the badge catches fire skid (a machine on a slippery road), this can mean both the activation of the system (blinking indicator) and its complete failure (constantly burning).
Indicator lamp-light (Spiral) is relevant for diesel engines. It should light up when the ignition is turned on and extinguish before the starter is started. If the spiral burns constantly or flashes during operation, this indicates a malfunction of the preheating system or a problem with the particulate filter. DPF.
- 🔧 Check Engine: General engine error requires computer diagnostics.
- 🌀 Spiral: Failure of the incandescent candles or particulate filter system (diesel).
- 🚗 Car with tracks: Failure of the system of course stability or traction.
- 💨 Exhaust gases: Problems with environmental systems (EGR, catalyst).
⚠️ Attention: Blinking indicator Check Engine This means ignition failures that can quickly destroy the catalyst. In this case, it is recommended to reduce engine speed and avoid high loads.
Indicators of liquids and technical levels
Modern cars are equipped with sensors of the level of various technical fluids. Indicator washer The most innocuous (and stainless) is the one that is reminiscent of the “washing” of the water. However, the indicator fuel-filter (a drop of water in a glass) on diesel cars can not be ignored: it indicates the accumulation of water in the filter, which can lead to the failure of expensive fuel equipment Common Rail.
An important element is level control. brake fluid. Often this sensor is combined with a wear sensor of brake pads. If the liquid level drops, this may indicate wear of the pads (pistons calipers moved further) or depressurization of the brake circuit. Visual inspection of the pads and pipes in this case is mandatory.
For cars with automatic transmission or variator, the presence of an indicator transmission-liquid temperature (a gear with a thermometer or wavy lines) is critically important. Overheating of oil in automatic transmission leads to rapid destruction of friction bags. When such a symbol is sunbathing, you should stop and let the box cool at idle turns.
Always check the oil level on the cold engine by mounting the car on a flat surface. Hot oil does not drain immediately, and the testimonials of the probe may be incorrect.
Security systems and auxiliary electronics
Electronics takes on many security functions, the status of which is informed by special symbols. Indicator pillow (a person sitting with a circle in front of him) when starting the engine should light up and go out. If it burns constantly, the passive safety system is faulty, and in case of an accident, the pillows may not work. The reasons often lie in the cliff of the plume under the seat.
Tyre pressure monitoring system TPMS It is marked by a cross section of the tyre with an exclamation mark. It lights up when puncture or seasonal pressure drop due to cold.
Indicator immobilizer (key or machine with a lock) normally should light up briefly when the ignition is turned on. If it flashes constantly or is lit red, the car will not recognize the key. This may be due to battery discharge in the key, demagnetization of the chip, or a faulty antenna in the ignition lock.
- 🪑 Airbag: Passive safety system malfunction, diagnostics are required.
- 🔑 Key/Castle: Problems with the immobilizer, the car may not start.
- 👁️ Eye: Failure of the road or adaptive cruise tracking system.
- 🅿️ Letter P: Problems with the electric parking brake.
Decoding of OBD-II error codes
When the panel lights up Check EngineIn the memory of the control unit, a specific error code is stored. To read them, a diagnostic scanner is used, connected to the connector OBD-II. The codes have a standardized format: one letter and four digits (for example, P0300). The letter indicates the system: P Powertrain: engine and transmission B (Body) Body, C (Chassis) - The running gear, U (Network) Network.
The first number indicates the standard: 0 - common SAE standard, 1 - the specific code of the manufacturer. The second number defines the subsystem. For example, in code. P0301: P - Engine, 0 - common code, 3 - ignition/pass system, 01 - first cylinder. Thus, P0301 means "Signition omissions in cylinder 1".
Popular error codes
P0171/P0174 - too poor mixture (air pump or fuel problem); P0420 - low efficiency of the catalyst; P0442 - leaky system of capture of vapor of gasoline.
Diagnosing codes is only the first step. Code. P0171 (poor mixture) can be caused by both a leaky pipe and a faulty mass air flow sensor. Therefore computer-diagnostics It should always be accompanied by a check of the "iron" and an analysis of the living parameters of the engine.
| Error code | Description | Possible cause | Urgentness. |
|---|---|---|---|
| P0300 | Accidental ignition failures | Candles, coils, nozzles, air suction | Tall. |
| P0420 | Catalyst efficiency below the threshold | Catalyst wear, lambda probe malfunction | Medium |
| P0133 | Slow response of the lambda probe (Bank 1) | Aging of the oxygen sensor, pollution | Medium |
| P0442 | Small leakage in the EVAP system | Gas tank's not tightly closed, pipe crack. | Low. |
Algorithm of actions when an error occurs
The appearance of an error on the dashboard does not always require panic, but requires an algorithmic approach. First, evaluate the color of the indicator and the behavior of the car. If there are no red lamps and extraneous sounds, you can continue to move in a gentle mode. If the car twitches, loses power or a knock is heard, call a tow truck.
Budgetary Diagnostics can be used for primary diagnosis ELM327 Adapters and applications on a smartphone. They allow you to read the error code and understand its essence. However, do not blindly trust the advice to “reset the mistake and forget”. If the problem is physical (a broken gasket, a broken wire), the error will return after several cycles of engine operation.
☑️ Actions in the ignition of Check Engine
Regular maintenance and use of quality fuel is the best prevention of errors. Many problems with the catalyst and lambda probes arise precisely from poor gasoline or oil that does not meet the manufacturer's tolerances.
Resetting an error without addressing its physical cause is a temporary measure that can lead to a breakdown aggravating and more expensive repairs in the future.
What if the Check Engine is on fire, but the car is running normally?
If the indicator is constantly lit in yellow, and the car has not lost dynamics, does not twitch and fuel consumption has not increased sharply, you can reach the service on your own. It is recommended to avoid high engine speeds. The problem is likely to be in the environmental system or sensors, but only the scanner will give the exact answer.
Can I drive with an ABS light?
Yes, you can. If the ABS malfunctions, the car brakes like a normal car without an anti-lock system. However, you need to be careful when braking on a slippery road or in an emergency, as the wheels can get locked and the car will be lucky.
Why do errors burn after battery replacement?
When power is cut, some systems (e.g. windows, throttle, steering) may reset adaptations. Often it is enough to do the procedure of "training" (for example, raise and lower the glass, turn the steering wheel to the stop in both directions with the engine running). If the errors do not go out after 10-20 km of run, diagnostics are required.
Does the Check Engine flashing signify a serious breakdown?
Yeah, flashing light. Check Engine This is a signal of critical ignition failures. Unburnt fuel enters the exhaust manifold and burns there, heating the catalyst to the melting temperatures of the ceramics. Operating a vehicle with a flashing indicator will quickly lead to the destruction of the catalyst.