Surely every motorist knows such a terrible word for malfunction as Check Engine or in Russian simply “CHECK”. There are categories of people who have never encountered it and are categorically afraid of its appearance, there are those who have already been somehow familiar and are trying in every possible way to avoid a new meeting. But unfortunately, there are those who simply ignore such a mistake and continue to operate the car, perhaps reducing it!
Engine troubleshooting system for Renault Logan
The engines on all Renault Logan cars are a technologically complex system with its own on-board computer, which is able to detect the presence of a malfunction at the earliest stages, from all kinds of sensors to a whole chain of systems.
You all understand that all errors and causes of malfunctions cannot be placed on any on-board computer, therefore, in order to notify the driver of any critical breakdown, the same Check Engine icon lights up.
At one time, errors can be non-fatal in nature of a malfunction, when, if you overlook this, a more serious failure can be missed. As you know, the same light bulb cannot light up twice. If you do not pay attention to the error message in time, then .
It follows from this that the "CHECK" signaling lamp must be diagnosed and removed as soon as possible.
We find out the reason for the fire of the check and remove errors
When the lamp lights up immediately after turning on the ignition, and immediately goes out - this is not a breakdown! Do not confuse!
For such manipulations, Renault Logan cars are equipped with a trapezoidal 16-pin connector for OBD-II type diagnostics, which is located in the glove compartment.
In order to determine the error of the system, you can use various diagnostic methods:
- A visit to a specialized car service, with the ability to diagnose and display errors using special codes with decoding. Keep in mind that the price of diagnostics alone can exceed 1000 rubles, no matter what type of malfunction.
- Buying an on-board computer that can not only read all errors, explain their cause, but also delete them from memory if necessary. Similar devices on Renault Logan are installed in place of the central air duct or in any convenient place on the windshield. It is worth noting that the purchase of such a BC will cost the owner in the range of 4000-5000 rubles. (This option is not the worst, since the functionality of such devices is quite wide).
One of the options for installing a non-standard on-board computer on a Renault Logan. Plus - ease of installation, minus - strongly attracts the attention of "marauders"
- Purchase a special OBD2-BT scanner (in popular Chinese online stores) or in city stores in order to use one smartphone and a special program to read, identify and clear all errors on the car's on-board system. This device is quite compact and mobile, it is fixed in the diagnostic socket and connected to the phone via Bluetooth.
The most optimal option in terms of price / quality is the ELM327 diagnostic adapter. Together with a cell phone, it allows you to completely replace the regular on-board computer
The device is able to establish the cause of the malfunction anywhere and in the shortest possible time.
P0420 Catalyst System Efficiency Below Threshold (Bank 1) Most often occurs when refueling low-quality fuel!
The easiest way to remove the "temporary" check
The easiest and fastest way to reset the error is to remove the terminal from the battery. However, this attempt will only hide the consequence of the malfunction, but will not reveal its cause, and after a while the “CHECK” will light up again.
Similar techniques are used by negligent car sellers who try to hide the obvious flaws of their car without unnecessary problems and costs. More.
Results
In any case, whichever of the options you choose in the end, it is the diagnosis of a malfunction of the “CHEK” warning lamp on Renault Logan that will help you identify the true cause of its occurrence. And the sooner you get rid of it, the more reliably each next kilometer of your journey will continue.
All Renault Sandero modifications are equipped with an on-board digital system capable of diagnosing errors and malfunctions in the operation of all nodes with integrated sensors. The first series of the car are equipped with electronic firmware with code 6001, on later models with an on-board computer, firmware code 6002. As for the engine, fuel supply system, ABS, the malfunction indicator is located in the dashboard light panel in the instrument cluster. Decryption of the malfunction of a particular node in this case is not provided.
Diagnosis can be made in two ways: using the on-board self-diagnosis program or an external test device.
Entering diagnostic mode
The self-diagnosis mode is blocked by the program. Before checking, it is necessary to insert the key into the ignition lock. Activation of the diagnostic mode of any Renault Sandero model (except for the Prestige configuration, where it is permanently active) is performed by pressing the pin button on the dashboard. Without releasing the button, turn the key to the ignition on position (position "M"). Keep the button pressed for a few seconds until the numbers appear on the dashboard screen. After the information appears, the button should be released. In this case, while the test mode is active, the arrows of the speedometer and tachometer will make a constant movement from the zero position to the extreme points.
Information display
The information is displayed through four consecutive screen images. Changing images is done by a short press on the button.
Instrument testing
If you wish, you can get more complete information about the status of Renault Sandero systems. The fact is that the appearance of malfunctions is signaled by regular signal lamps on the dashboard. Data on what kind of breakdown takes place is not displayed on the scoreboard. In order to get a complete picture, you need to use a professional tester (adapter, scanner) or a special computer program that is compatible with the Windows package, which can be installed on a laptop. There are also dedicated apps for smartphones and tablets. The main thing is to choose the appropriate type of connecting cable.
As for the scanner, then, as a rule, a certain type of adapter is intended for each car model. Some testers transmit information directly to a computer via Bluetooth.
The external diagnostic device is connected to the Renault Sandero electronic system via a 16-pin OBD-2 connector. It is located in the glove box of the front panel and is closed with a plastic plug.
During testing, the display of the device will not display information about the damage, but the so-called error code.
Basic trouble codes
DF 002 - Throttle potentiometer malfunction.
DF 003 - damage to the temperature sensor of the air massmeter (air meter).
DF 004 - failure of the engine cooling system sensor.
DF 006 - malfunction of the detonation channel.
DF 014 - valve failure of the fuel vapor recovery system.
DF 017 - failure of the crankshaft position control system.
DF 018 - clogged oxygen sensor.
DF 022 - failure of the control unit.
DF 032 - failure of the warning lamp for overheating of the cooling system.
DF 038 - the heater is clogged.
DF 044 - the immobilizer has failed.
DF 061 - ignition modules (coils) I and IV are damaged.
DF 062 - the same II and III.
DF 064 - failure of the speed sensor.
DF 106 - Catalyst damaged.
DF120 - The on-board diagnostics indicator burned out.
DF 253 - there is no full contact between the engine and the "mass".
DF 261 - leakage of the fuel pump relay.
DF 052 - DF 055 - damage to injectors I, II, III and IV, respectively.
A complete list of Renault Sandero error decoding can be found by clicking on this link.
When self-repairing or replacing damaged components, the error code will remain in the system memory. Its removal is carried out using the same scanner.
A complete list of Renault Sandero error decoding
P3500 Immobilizer Circuit
P3501 Climate communication error
P3502 Communication error with BVA (cruise)
P3503 Communication error with ABS
P3504 Refrigerant pressure sensor circuit
P3505 Fuel system error
P3506 Cylinder #1 and #4 ignition coil circuit shorted to ground
P3507 Cylinder #2 and #3 ignition coil circuit shorted to ground
P3508 Error Circuit of the ignition coil of cylinders No. 1 and No. 4
P3509 Error Circuit of the ignition coils of cylinders No. 2 and No. 3
P3511 The actuator relay control circuit is shorted to ground
P3515 Canister purge solenoid valve circuit shorted to +bat
P3517 OBD warning light circuit
P3518 Coolant temperature warning light circuit shorted to +bat
P3519 Coolant temperature warning light circuit shorted to ground
P3520 Coolant Temperature Alarm Circuit Open
P3521 Coolant temperature warning light circuit
P3522 Idle speed control circuit shorted to +bat
P3523 Electronic pedal circuit open
P3524 Electronic pedal circuit short to +12 volts
P3525 Electronic pedal circuit short to ground
P3526 Electronic pedal circuit malfunction
P3527 Climate control circuit open
P3528 Climate control circuit short to +12 volts
P3529 Climate control circuit short to ground
P3530 Climate control circuit malfunction
3500 Electronic anti-theft engine immobilizer circuit
3501 Climate communication error
3502 Communication error with BVA (cruise)
3503 Communication error with ABS
3504 Refrigerant pressure sensor circuit
3505 Fuel system error
3506 The ignition coil circuit of cylinders No. 1 and No. 4 is shorted to ground
3507 The circuit of the ignition coils of cylinders No. 2 and No. 3 is shorted to ground
3508 Error Circuit of the ignition coil of cylinders No. 1 and No. 4
3509 Error Circuit of the ignition coils of cylinders No. 2 and No. 3
3511 The actuator relay control circuit is shorted to ground
3515 Canister purge solenoid valve circuit closed to +bat
3517 OBD signal lamp circuit
3518 The alarm lamp circuit of the emergency coolant temperature is shorted to + bat
3519 The alarm lamp circuit of the emergency coolant temperature is shorted to ground
3520 The alarm lamp circuit of the emergency coolant temperature is broken
3521 Alarm lamp circuit for emergency coolant temperature
3522 Idle control circuit closed to +bat
3523 Electronic pedal circuit open
3524 Electronic pedal circuit short to +12 volts
3525 Electronic pedal circuit short to ground
3526 Electronic pedal circuit malfunction
3527 Climate control circuit open
3528 Climate control circuit short to +12 volts
3529 Climate control circuit short to ground
3530 Climate control circuit malfunction
Many of us have encountered such a problem as turning on the engine icon (Check engine ...), the appearance of which scares car drivers. We offer you 5 of the most common reasons why the check engine light on the dashboard lights up.
The appearance of the engine indicator icon occurs, as a rule, without warning. The reason for the appearance of the Check engine cannot be immediately understood. Even if the car has auto diagnostics (for example, in cars such as,), which scans all car systems for errors and, if any, displays a decryption on the information panel, the reasons for the appearance of an engine check will not be deciphered.
For most drivers, the appearance of this warning icon on the instrument panel means the need to urgently go to a car repair shop to diagnose and fix the cause of the "Check Engine" warning sign. But in fact, in most cases, when the "Check" indication appears, you can, and in some cases, possibly, eliminate the cause yourself without a trip to a car service, which will save you money.
1. Replace the oxygen sensor (lambda probe)
The oxygen sensor in your car is part of the exhaust aftertreatment system that monitors how much oxygen has not been burned in the engine's combustion chamber. This sensor helps to control the fuel consumption of the car. A malfunctioning oxygen sensor (lambda probe) means that the car computer is not receiving correct data, which can significantly increase fuel consumption and reduce engine power. Most cars have 2 to 4 oxygen sensors. If you have a home automotive error scanner, then by connecting it to the car, you can easily find out which sensor needs to be replaced.
For what reason does the oxygen sensor in the car become unusable: Over time, the sensor becomes covered with a layer of used and engine oil (oil soot), which reduces the accuracy of reading the sensor readings to regulate the gasoline mixture and distribute the optimal one. A malfunction of the oxygen sensor in a car leads not only to, but also to an increased content of harmful CO2 substances in the exhaust.
What needs to be done: If you do not change a faulty car oxygen sensor, this can lead to the failure of your car's catalyst (may burst), which will result in an expensive repair. The cost of new catalysts is very high due to the content of precious alloys. On some cars, there are several catalysts, the cost of which can reach up to 90,000 rubles. So do not pull with the replacement of the sensor. Although the replacement of the sensor and its cost is not very small, but it is not commensurate with the cost of the exhaust gas converter system. You can also save on replacement costs by doing it yourself. Many car manuals have detailed instructions on how to replace the oxygen sensor yourself. If you know where the oxygen sensor is located, then it will not be difficult for you to disconnect the faulty "lambda probe" and replace it with a new one. Remember that you can’t pull with the replacement of this important element!
2. Check the fuel filler cap
Many drivers, in most cases, when the "check engine" indication appears, they will think of serious problems in the car's engine, but will not even think to check the tightness of the fuel system, which may be broken due to a defect or insufficiently tightened fuel filler cap. This is a very common reason for the "Check" engine icon to appear.
Reason for the error: Leakage of the fuel system due to the passage of air by the fuel filler cap will increase the fuel consumption of the vehicle, to which the vehicle diagnostic system will issue an engine error by turning on the “Check engine” indication on the instrument panel of the vehicle.
What needs to be done: If, when the "Check" indication appears, your car does not lose power, and there are no sound signs of engine damage (engine knocking, hum, squeaking, etc.), then first of all check the tightness of the gas tank. Your gas tank cap may be cracked or not tight enough. If the cap was not tightened enough, after tightening it all the way, continue driving the car for a while to see if the engine error disappears. To prevent the appearance of an engine check for this reason, regularly check the fuel filler cap. Remember that periodically the cover must be replaced with a new one!
3. Car exhaust catalyst
The car catalyst helps the car to make the exhaust gases of the engine more environmentally friendly. It converts carbon monoxide and other harmful substances into harmless compounds. If your exhaust gas catalyst has become unusable, you will notice this not only when the engine icon (check) appears, but long before that, when the car's power drops by 2 times. For example, when you press the gas pedal, the car, as before, will not have good acceleration dynamics.
What can cause a car catalytic converter to fail: if you regularly service your car, in accordance with the maintenance regulations of the car company, then the catalyst should not fail. The main reason for the failure of the catalyst is the untimely replacement of a faulty oxygen sensor, as well as the irregular replacement of spark plugs at the end of their expiration date. When the oxygen sensor or spark plugs fail, the conversion of carbon monoxide in the catalyst to harmless chemical elements stops, which leads to overheating of the catalyst, which can fail because of this.
What needs to be done: If your catalytic converter has become unusable, then you cannot drive a car, as the engine will not work correctly, warning about this by indicating the engine icon (check) on the dashboard. Also, you will have very much increased fuel consumption, and there will be no engine thrust. Although the replacement of the catalyst is a very expensive repair, there is nowhere to go from the repair. Although there is an alternative in replacing the catalyst with a flame arrester, but this is not a 100 percent option. Unfortunately, if you are not an experienced auto mechanic, then you cannot replace a faulty exhaust gas catalyst yourself. In any case, you will have to contact the auto repair shop. Remember that timely replacement of oxygen sensors and spark plugs protects your catalytic converter from damage!
4. Replace mass air flow sensor
The mass air flow sensor regulates how much air must be added to the gasoline mixture for optimum ignition of the fuel. The sensor constantly informs the car's computer about the amount of oxygen supplied. A defective mass air flow sensor increases fuel consumption, increases CO2 levels in the exhaust gas, and reduces engine power and ride quality. Also, with a faulty sensor, poor acceleration dynamics are observed. In cold weather, a car with a faulty sensor does not start well.
What are the reasons for the failure of the mass air flow sensor: Most sensor failures occur due to improper installation of the air filter during its scheduled replacement. Also, if the air filter is not changed regularly, as required by the vehicle maintenance schedule recommended by the manufacturer, the mass air flow sensor may fail.
What needs to be done: Theoretically, you can drive for a long time with a broken mass air flow sensor (several weeks or months). But you will notice that the longer you drive, the more fuel consumption increases. Replacing the sensor in a car service is not so expensive, since the work itself does not take much time and is quite simple. The main costs are associated with the cost of the sensor, which for some car models can be 11,000-14,000 rubles if it is an original sensor or up to 6,000 rubles if it is an analog substitute. Self-replacing the sensor is very simple. But due to the low cost of replacing the sensor, you can entrust this work to a master in a car service. Remember that it is necessary to change the air filter regularly, following the vehicle maintenance regulations!
5. Replacing spark plugs and high voltage wires
Spark plugs in a car are the main parts for igniting the fuel mixture. With faulty spark plugs, there is an incorrect spark supply to ignite the gasoline mixture. Faulty plugs often have no spark or an incorrect spark interval, resulting in improper engine operation. If the spark plugs do not work properly during acceleration, especially from a standstill, you may feel slight jolts.
What are the reasons for the failure of spark plugs: Most spark plugs in pre-1996 vehicles need to be changed every 25,000-30,000 kilometers. In newer cars, spark plugs last more than 150,000 km. However, these scheduled spark plug replacement times may be reduced due to various factors related to fuel quality and driving style.
What needs to be done: If your candles have not been changed for a long time, or if you feel ignition-related failures in the engine, then you should immediately replace them with new ones without delay. Do not try to save money on late replacement of spark plugs, as the cost of candles is not very expensive, as well as the work of replacing them. By changing old spark plugs, you will improve engine performance and reduce vehicle fuel consumption. It is quite easy to change the spark plugs yourself. Basically, they are easily accessible under the hood of the car. You need an ordinary spark plug wrench to unscrew the spark plugs from the engine. It is also advisable to monitor the condition of the high-voltage wires, as over time they can become unusable and pass electricity that is transmitted to the spark plugs, which will reduce the strength of the spark. Remember that regularly changing your spark plugs, in accordance with your vehicle's maintenance schedule, keeps your exhaust catalyst from breaking down and improves engine performance!
