Owners of LADA cars with an electronic gas pedal may encounter error P0504 (mismatch of brake pedal sensors). Along with it, malfunctions in the engine may appear (stalls, speed fluctuates, does not start, etc.). Most often the cause is the brake pedal position sensor (brake light sensor or frog).
The brake pedal position sensor and brake light switch are mounted in one housing. Most often, the cause of its malfunction is a broken spring. In this case, you can repair the sensor yourself by replacing the spring with a new one. Or replace the sensor with a new one.
Device characteristics and signs of wear
The brake pedal sensor is a technical device that monitors the degree of pressure on the brake pedal. It has a simple design. It is a “frog” with two contacts for opening and closing. A closed contact lights up the brake lights when the brakes are applied. The open contact serves to send a signal to the computer to remove the load from the engine and reduce the fuel supply during braking.
Signs of wear on parts:
- Reduced engine responsiveness and power when pressing the pedal.
- Error “P-0504” appears.
- A short-term increase in engine speed when changing gears.
AVTOVAZ 21080-3720010-10, price - 110-115 rubles.
Checking and adjusting the free play of the brake pedal on VAZ 2108, 2109, 21099
The free play of the brake pedal of VAZ 2108, 21081, 21083, 2109, 21091, 21093, 21099 cars is 3-5 mm.
In the braking system of VAZ 2108, 2109, 21099 cars and their modifications, the free play of the brake pedal is the pedal travel from its top position until the brake mechanisms begin to operate. The upper position of the pedal is limited by the brake light switch (the pedal rests against its moving contact with its stop).
Checking the free play of the brake pedal of VAZ 2108, 2109, 21099 cars
We check the free play of the brake pedal with the engine turned off.
— We measure the distance from the floor to the released brake pedal
To do this, place a tape measure or ruler against the floor of the car and measure the distance to the upper surface of the platform with the pedal fully released.
We measure the distance from the pedal platform to the floor under the driver’s feet (measurement points can be chosen arbitrarily)
— We measure the distance from the floor to the pressed brake pedal
Without removing the tape measure or ruler, lightly press the brake pedal with your hand and lower it down until you feel resistance to movement. Using a ruler or tape measure, we determine how many millimeters the pedal platform has dropped. This will be the free play of the brake pedal.
If it does not fit within the required limit of 3-5 mm (more or less than this value), we adjust the free play of the brake pedal.
We measure the distance from the pressed brake pedal to the floor
Adjusting the free play of the brake pedal of VAZ 2108, 2109, 21099 cars
To adjust the free play of the brake pedal, you must move the rear brake light switch, which serves as a stop for the brake pedal. See photo at the beginning of the article.
— Loosen the locknut of the brake light switch
We use two open-end wrenches at “19”.
— Move the brake light switch
To move, rotate the nut securing the brake light switch. We use the same key on “19”. To reduce the free play of the brake pedal, screw it (clockwise) onto the switch. To enlarge, on the contrary, turn it away (counterclockwise).
— Fix the brake light switch
Fix the switch in the required position by tightening the locknut.
Checking the free play of the pedal and the operation of the brake light lamps
After adjusting the brake pedal free play, check its value again. If it again does not correspond to the norm, we carry out the adjustment again.
Factors on which the price depends
It is difficult to say how much money you will have to spend to purchase a brake pedal sensor for the Lada Granta. After all, the following factors influence the purchase price of such a technical device:
- Design features.
- Principle of operation.
- Technical condition of the device.
- Reputation of the manufacturing plant.
- Originality.
- The city where the purchase is being made and the degree of competition there.
- The need to deliver the device and its cost.
- Availability of current discounts on spare parts.
Instructions for replacing the brake controller
- Pump out the liquid.
- Place the vehicle on a support stand and remove the wheel.
- Use a wrench to unscrew the two wheel pins.
- Remove the brake drum.
- Then, using a screwdriver, pull out the hook of the upper tension spring and remove the part. Perform the same manipulation with the lower tension spring.
- Then remove the front pad and spacer bar, while disconnecting the pressure spring and lower the pad.
- Remove the shoe lever from the parking brake hole, straighten the cotter pin and remove it from the parking brake drive.
- Remove the washer and lever.
- Install a new block and assemble the part in the reverse order.
Rear disc brakes on Lada Kalina
Types of parts
All brake pedal sensors are divided into two types:
- Push-button . Made in the form of a button that closes and opens contacts when you press the brake pedal with your foot.
- Magnetic . They are activated when a magnetic field is formed. Such products are more reliable, durable, but expensive.
The following types of devices are available for sale:
- New sample (Renault sensors).
- Old style (on threads, nuts).
Depending on the country of production, the following spare parts are available:
- Imported.
- Domestic.
According to the manufacturer, the part for Lada Granta may be as follows:
- Unoriginal.
- Original.
Depending on the year of manufacture of the car, you can purchase a brake pedal sensor for a Lada Granta of this generation:
- The first (2011-2018 years of production).
- The first after restyling (from 2022 to present).
Depending on their technical condition, the following parts are available for sale:
- New.
- Used.
Depending on the place of purchase, the spare part may be as follows:
- Taken from a specialized market.
- Purchased at a vehicle dismantling point.
- Purchased directly from an auto parts manufacturer.
- Ordered from an online trading company selling auto parts.
- Taken from a private person.
- Purchased from a local retail or wholesale auto parts store.
Renault 8200168238, price - 400-450 rubles.
Pre-installation diagnostics
Before buying a new product and installing it to replace a seemingly faulty old sensor, try diagnosing and troubleshooting it yourself. So, on the body of the product there are two special nuts, one on top, the other on the bottom. The top nut adjusts the gap of our sensor. As mentioned earlier, in some cases the gap is set incorrectly, which disrupts the normal movement of the button. Your task is to find and set the optimal gap so that nothing interferes with the operation of the button. After the adjustment work, reset the ECU error, start the car engine and let it run for 15-20 minutes (the error does not register immediately). If the error does not appear, it means that the reason for the incorrect operation of the internal combustion engine is incorrect settings of the Granta brake sensor. Otherwise, you should replace the faulty device with a new, working one.
Approximate prices
In domestic auto parts stores and on the market, a new brake pedal sensor for Lada Granta cars can be purchased for 110-450 rubles . Prices for such technical devices are presented in the table below.
| Detail number | Company manufacturer | A country | What sample is the part? | Cost in rubles |
| 1118-3720010 | AutoElectroArmature | Russia | old | 240-270 |
| 1118-3720010-211.3720 | AutoElectroArmature | Russia | old | 350-400 |
| 11180-3720010-00 | AutoElectroArmature | Russia | old | 330-350 |
| 21080-3720010-10 | AVTOVAZ | Russia | old | 110-115 |
| 8200168238 | Renault | France | new | 400-450 |
| 1118-3720010 | Electro Stavr | Russia | old | 190-200 |
Electro Stavr 1118-3720010, price - 190-200 rubles.
A new model brake pedal sensor for the Lada Granta can be purchased from a private individual for 150-300 rubles . An old-style device sells for 100-200 rubles . If you need to deliver a part from another city, then you will have to pay for the service of the transport company. It costs about 200-400 rubles.
About alternative sensor options
Since domestic “devices” for the Lada Granta car are not able to prevent an unpleasant situation, it is possible to use other devices that act as analogues. Such a component could be a brake light switch from Volkswagen, or more precisely: “FACET 7.1126”. This switch is slightly more expensive than the “native” one (560 rubles) and has the following features:
- four contacts;
- threaded leg with a similar diameter of 12 mm.
To successfully install the indicated analogue, you will need to acquire an adapter for the terminals.
Car : Lada Granta. Asks : Evgeniy Denisov. The essence of the question : Lada Granta is getting error p0504?
Hello, please tell me what could be the cause of the malfunction on my Lada Granta: the check light periodically lights up, on the on-board computer and during diagnostics using ELM 327 it was possible to establish error code p0504, what does this mean and how to fix it?
Which car to choose - “automatic” or “manual”?
Heated debates are taking place among drivers of different ages, driving experience and gender: which is better - a car with a manual transmission or an automatic one. And here we should remember one important fact: all beginners in all driving schools are taught in “mechanics”. And all because it is always much easier to switch from “mechanics” to “automatic”. Driving a mechanical car is, of course, more difficult, but at the same time you control the entire process, every movement of the car, and are more concentrated.
Leveling up
First, open the hood of the VAZ-2115. The brake fluid reservoir (TF) is located here. Remove the cap from it and check if it is filled properly. If the level does not reach the “max” mark, then add the missing volume.
- unscrew the cap covering the fitting on the rear wheel brake cylinder;
- pour a little TJ into a transparent jar;
- Pull the hose onto the fitting (it should fit as tightly as possible);
- Immerse the other end of the tube in the container so that it is below the liquid level.
Source
Operating principle of the gearshift mechanism
The gearbox control rod, or shift linkage, is a structure that connects the gearshift lever to the gearbox rod. This lever itself is often mistakenly called a rocker, but this is not so. The slide is a complex mechanism that transmits a given command to the shafts.
In older cars it was traditionally located under the gearbox, but in newer ones it was placed under the floor. Absolutely all manual cars and some automatic cars have a rocker. In CVT cars and robots, commands are transmitted directly.
On which cars is this problem most common?
The problem with code P0504 can occur on different machines, but there are always statistics on which brands this error occurs more often. Here is a list of some of them:
- Chery (Chery Fora)
- Chevrolet (Chevrolet Captiva, Epica)
- Citroen (Citroen C4)
- Datsun (Datsun on-DO)
- Fiat (Fiat Doblo, Ducato)
- Ford (Ford Kuga, Transit, Focus, Fusion)
- Hyundai (Hyundai Grand Starex, Santa Fe, Solaris, Starex, i30)
- Kia (Kia Rio, Sid, Sorento, Sportage)
- Land Rover (Land Rover Range Rover, Freelander)
- Lexus (Lexus gs300)
- Lifan (Lifan x60)
- Nissan (Nissan Pathfinder)
- Opel
- Peugeot (Peugeot 308, Boxer)
- Toyota (Toyota Avensis, Auris, Corolla, Land Cruiser, Prado, Rav4)
- Volvo
- VAZ 2113, 2114, 2115
- Gazelle Business, Next
- Lada Vesta, Granta, Kalina, Largus, Niva, Priora
- UAZ Patriot, Hunter
With fault code P0504, you can sometimes encounter other errors. The most common ones are: P0016, P0019, P0098, P0121, P0171, P0422, P0432, P0455, P0500, P0571, P0700, P0716, P0732, P0733, P0734, P0746, P0842, P2714, C1241, U040 5.
Source
Automatic transmission operating modes
Basic modes
The first thing you should do is familiarize yourself with the operating modes of the automatic transmission, since you won’t be able to drive an automatic without these nuances. So, what are the designations of the letters on the automatic transmission and what gears do they represent?
- P – Parking . This mode involves blocking the shaft and drive wheels. The relevance of use is observed if the driver leaves the car or during a long stop. Only after the vehicle has come to a complete stop can this mode be activated, otherwise the gearbox may be damaged. To activate another position from this mode, you must use the brake pedal. If the surface is relatively flat, there is no need to use the handbrake. On a steep slope, you must follow the procedure for applying and releasing the handbrake. To set it up, you need to pull the handbrake while holding the brake, then release it, and the car will move slightly. All that remains is to activate the “P” position. To release the handbrake, move the lever to the driving mode and remove it from the handbrake while holding the brake.
- N – Neutral gear . It is relevant if it is necessary to move the car a short distance with the engine running, for example, in a car service. Some drivers believe that activating this mode while driving downhill will save fuel. In fact, this is not the case, since you will still have to switch to mode D, which is why the gearbox will undergo additional load. Also, driving with an automatic transmission does not require activation of the neutral position during short stops, for example, at a traffic light.
- R – Reverse . The mode must be activated if you need to move in reverse. It is permissible to switch to this mode only after pressing the brake pedal and stopping the car completely. Activating the mode in question while driving will lead to damage to engine components, transmission and the gearbox itself (read our expert’s article on how to enter the box in reverse using an automatic transmission).
- D – Basic driving mode . It is this mode that is often used to move forward. Movement is possible at any available vehicle speed from zero to maximum.
- L – First gear only . Used for off-road driving or other difficult road conditions. Switching to this mode is unacceptable if the car is moving at a speed above 15 km/h.
- 2 – Only the first 2 gears . Suitable for driving a vehicle on a winding mountain road. Another option is towing another car or trailer. Driving at speeds above 80 km/h is an obstacle to activating the mode in question.
How to brake
Since driving an “automatic” after a “manual” is quite difficult, gaps in knowledge can be both at the starting stage and at the braking stage. There are few rules here, the main principle is to press the brake pedal when you need to stop, but there are some nuances.
- Stopping in front of a zebra crossing or traffic light is carried out in “D” mode. Just press down on the brake pedal.
- You can activate the neutral mode during a long traffic jam if you want to save on gasoline. We are talking about parking for more than 30 seconds. The brake pedal must not be released, otherwise there is a risk of accidentally hitting other cars.
- If you are confident about a long stop on the highway, switch to “P” to allow your right leg to relax slightly.
Using the handbrake
Do not overly trust the vehicle’s automation and refuse to use the handbrake. The relevance of its use is observed at any long stop, according to the car’s operating instructions.
It is also advisable to use the handbrake in the following cases:
- stopping on a slope;
- stopping to change tires;
- stopping while the engine is running.
Towing
The possibility of towing a vehicle with an automatic transmission is considered by many drivers, but the only condition in this case is a speed of less than 50 km/h, the neutral position is activated and the engine is running. The range of such towing should not exceed 50 km. If you can’t start the car, using the services of a tow truck will cost less than repairing the transmission.
If you are acting as a towing driver, keep the following points in mind:
- the automatic machine copes well with trailers that are not too heavy;
- the vehicle you are towing must be the same weight or lighter than your vehicle;
- It is better to avoid such manipulations altogether if there are alternative options.
