Error P0504 Grant: detection, causes, solution

During operation of a modern car, defects in engine operation may appear: failures, short-term lack of response of the gas pedal, etc. At the same time, the “Check Engine” icon lights up on the instrument cluster panel, which translated from English sounds like “check the engine.” The car owner goes for diagnostics, where a computer connected to the car detects error P0504. The brake pedal position sensor (frog) is responsible for this failure in the system. Next, we will tell you where the sensor is installed, how to check, repair and replace it.

Causes and symptoms of malfunction

Most often, error P0504 worries owners of Lada: Grant, Priora, Kalina and other VAZ cars with an ECU. Often a defect appears on GAZ cars, for example, GAZelle NEXT. But owners of foreign cars are less likely to contact the service to eliminate error p0504 and replace the sensor (frog). Most likely, the quality of foreign spare parts is much better. What symptoms indicate that the brake pedal sensor is faulty:

The engine begins to work unnaturally: it feels like it either stalls while driving, then immediately starts.
The traction disappears at around 40 km/h, but after applying the gas, the former agility is restored. Then the defect appears again.
The brake lights do not light up, or on the contrary they work constantly.

The cause of incorrect operation of the “frog” can be: mechanical damage, oxidation of contacts or wire breakage. Sometimes a failure occurs due to the burnout of both brake light bulbs. Due to the listed defects, an error appears in the system under code p0504. It can be removed, but it will appear again soon.

What are the reasons that cause sensor failure?

A detailed examination of the essence of the problem that arose, when error code 0504 appeared, will allow us to determine the list of reasons. This refers to the disassembly of the ill-fated sensor in the LADA Granta car. Three clips serve as an obstacle to this noble procedure, preventing the component from being easily disassembled. After overcoming this “barrier”, it becomes possible to observe the real reasons that caused the breakdown:

deformation of the smaller (of 2) springs located on the rod;
different heights of the contacts of the designated sensor;
poor material (steel) used for the manufacture of terminals;
presence of play on the floating contact element.

“Ringing” can be used as the initial stage of diagnosis. Each of the contacts must be subjected to this action separately, and then in pairs (“2nd” with “3rd”). The experience of LADA Granta owners indicates the presence of a dull tone during ringing, which confirms the malfunction of the contact group. Serviceable contacts are characterized by a distinct ringing “squeak”.

The operation of the brake pedal sensor is based on the following technology:

the rod is located inside the element and presses the floating contact (when the pedal is released) to the upper group;
the rod is again inside, but the pressure is applied to the lower group (corresponds to the depressed position of the pedal).

This principle is not complicated, but this does not improve the performance of the sensor. The main problem lies in the bent state of the floating contact. This kind of defect can occur due to this contact getting caught on the spring element, which provokes the sensor to send a signal to the LADA Granta on-board controller about the allegedly activated brake, which is why error code 0504 occurs.

How to change

The sensor is located slightly above the brake pedal lever. To find it, you need to look under the torpedo. On Lada Priora, Grant and Kalina, a 19 mm open-end wrench will be required for dismantling. The replacement process looks like this:

Remove the negative terminal from the battery
Disconnect the 2 plugs from the sensor.
Loosen the locknut with a 19 mm wrench (remember its approximate location).
Unscrew the sensor counterclockwise.
Install a new one and secure it with the adjusting nut.
Connect the battery.
Turn on the diagnostic equipment and clear the old error P0504.

The old sensor is quite repairable. In most cases, the cause of the malfunction is a broken spring. If you disassemble the body and install a new spring, the “frog” will work again.

Car owner's comment: On my Lada Grant, a spring broke in the sensor and began to close the contacts of the limit switches. When I left the car overnight, the ignition did not seem to turn off, which is why the battery ran out completely several times. I bought a new battery, but the problem did not go away until I made diagnostics and replaced the sensor. At the same time, the Check Engine did not light up.

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.

Which one to buy

Experts and service workshop specialists recommend purchasing an original brake sensor. It is of better quality and lasts longer.

Table 1. Price of brake pedal position sensor

Manufacturer	Code	Cost, rub.
AvtoVAZ	11183720010	170
Avar	2113720	180
AMY	11183720010	95

Source: autopiter.ru

Before changing the “frog”, you can “ring” it with a tester to make sure the part is working.

How to resolve error P0504?

Error Code P0138
The brake light switch is located under the instrument panel at the top of the brake pedal lever. The brake booster lifts the pedal to the fully extended position. The brake light switch is installed on the crossbar support bracket directly behind the brake pedal mounting bracket. The only way to access the switch is to move the front seat back, lie on your back and look up under the dash. You will see a bracket with a switch on the top of the brake pedal lever. The switch will have four or six wires. The switch lies in the bracket so that its activating rod will be in contact with the brake pedal handle when the pedal is fully extended. At this point, the switch is suppressed by the brake pedal, cutting off the current. When the brake pedal is depressed, the lever continues to engage and activate the brake lights. When the pedal is released, the lever presses the rod again, turning off the brake lights. Diagnostic StepsHave helper checking brake lights. Make sure they work by turning them on and off and that the bulbs are good. If the brake lights come on constantly, the brake light switch is not adjusted correctly or is faulty. The same applies when they don't work. Move the driver's seat back and look under the dashboard. Squeeze the tabs on the electrical connector located on the brake light switch and remove the connector. Using a voltmeter, check the voltage on the red wire in the connector. Place the black wire on any good ground and the red wire on the red wire. You should have 12 volts unless you check the wiring to the fuze block. Plug the connector into the switch and backprobe the white wire with the pedal depressed. You should have 12 volts with the pedal depressed and no voltage with the pedal depressed. If there is no voltage, replace the brake light switch. If there is voltage on the white wire with the extended pedal, replace the switch. If the switch has an adjustable category, check the adjustment. The switch must be in good contact with the pedal handle and fully depressed. If the brake lights are functioning correctly but you still have a code, check the other wires at the brake light switch. Remove the connector and check the remaining wires for power. Make a note of the location of the power cord and replace the connector. The rear mantle is power wire by wire with the pedal depressed. If no force replaces the switch. If the last test had power as the pedal was depressed the switch is good. The problem exists in the wiring to the computer or with the computer itself. Locate the terminal of the computer's STP probe and the rear probe on the computer for grounding. If 12 volts is displayed poorly on the computer voltmeter. If there is virtually no voltage, replace or repair the wiring harness from the computer to the switch. Additional Notes Please be aware that some vehicles are equipped with driver-side knee airbags. Therefore, be careful when working with air pockets. Here is the brake pedal switch shown on a 2011 Ford f-150

Possible reasons for the check function to light up

Check engine light came on during hard acceleration

This function is responsible for the operation of the engine and if it signals, then there may be problems in the operation of this particular unit. Of course, this is scary for any motorist, because repairing the power unit is complex and expensive. But don’t immediately get scared and panic, the reason may be petty.

So, let’s look at what are the reasons why the “CHECK” function on the Lada Grant came on:

If the indicator lights up when you start the engine, then don’t worry, everything works.
If the “CHECK” lights up and signals for a long time, then, first of all, it is necessary to make a diagnosis, and only then worry.
If there is a “CHECK” while driving, this may mean that the oil level in the engine is insufficient (p0523 - error when the oil pressure sensor is faulty).
The “CHECK” function is on - it’s worth checking the engine for signs of depressurization or oil leakage.
If the above reasons do not work, but the “CHECK” is lit, then this may be a signal that the spark plug has failed or low-quality fuel has been filled.

Elimination methods

Let's consider some options for eliminating the causes of the “CHECK” function fire on the Lada Grant:

Bad fuel. The elimination method is quite simple - drain the low-quality fuel and fill in new one. Let the engine run a little and turn it off. If everything is normal, then upon startup, the signal will disappear. AvtoVAZ recommends refueling with 95 gasoline, but it often causes errors and complaints about its quality. What kind of gasoline do you fill up with, 92 or 95?
Spark plugs and high-voltage wires. Unscrew all spark plugs and check the gaps and the presence of a spark. Replace faulty spark plugs and wires.

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.

What to do if it is not possible to purchase a sensor

It also happens that error p0504 appears at the most inopportune moment, for example, when you are in some outback and it is not possible to purchase a new sensor.

In this case, you should remove the same sensor and try to disassemble it. It is quite possible that the contacts in it simply burned out. A breakdown of this type is not uncommon, especially on the Lada Granta.

But there is another, fairly common reason for such a breakdown. This is a spring that has become so stretched over time that it can no longer perform its intended functions. To fix this problem, simply replace the spring.

And in conclusion, I would like to note that if error p0504 appears on the on-board computer of your Lada Granda quite often, then we can say with almost 100% certainty that the brake sensor is to blame.

To eliminate a constantly recurring problem, you should simply purchase a new sensor from a specialized store. It is very noteworthy that if your car is still under warranty, you can contact an authorized dealer to fix the problem, since the problem is covered under warranty.

If you do not have such a desire, simply replace the sensor with a new one. It will cost you about 200 rubles. Agree, quite a small amount of money, for the sake of saving which, it may not be worth contacting the service center with a warranty card.

By the way, you can also replace this element of the car either at a service center or with your own hands. But for the last step you will need the appropriate tool and some skills.

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

Lada Granta error codes: decoding

The following errors may not be relevant for some vehicle modifications. If the decoding or codes do not match, it is recommended to consult the machine’s service manual.

Lada Granta: on-board computer errors responsible for the muffler and exhaust cleaning system (0000)

030-032 – first oxygen sensor, open circuit or short circuit of lines;
036-038 – similar for the second sensor.

Trunk units intended for air supply (0100)

101-103 – Mass air flow sensor incorrect element readings or open circuit;
107-108 – incorrect pressure in the intake manifold;
112/113 – incorrect reading of the air temperature on the intake manifold;
115-118 – DTOZH incorrect readings, breakdown or break of the corresponding line;
122/123 – TPS unit breakdown or large discrepancy between actual and measured data.
130-135 – oxygen sensor No. 1, there is a network problem or a break in the lines.
136-141 – similar for oxygen sensor No. 2;
171/172 – excessively lean or enriched fuel mixture.

VAZ Granta errors indicating a malfunction in the gasoline supply system (0200)

200 – the wiring on the injector control module is broken, the unit itself may also be damaged;
201-204 – break in the supply line of injectors for No. 1-4, respectively;
217 – the motor has overheated, the second value is a breakdown of the internal combustion engine temperature sensor;
222/223 – TPS excess or critical decrease in signal level from the unit;
261/264/267/270 – injector control lines for numbers 1-4, respectively, a short circuit to body weight was detected;
262/265/268/271 – similar, only with a short circuit to the on-board wiring.

Decoding Grant errors indicating incorrect settings or malfunction of the ignition system (0300)

300 – there are ignition misfires in a random or stable order;
301-304 – similar for 1-4 cylinders, respectively;
325 – the fuel mixture detonation sensor has failed, also indicating an open circuit;
326-328 – is responsible for the above element, indicates a problem with the sensor itself;
335-338 – DPKV is faulty or the wiring is damaged;
340/342/343 – DPRV software failure or physical damage to wiring elements;
346 – the phase distribution sensor is broken or there is a violation of the wire insulation;
351-354 – malfunction of the ignition coil for each cylinder in series;
363 - error 0363 Granta indicates that there is a misfire in the catalytic converter protection system.

Lada Granta computer errors that are not directly related to the ECM (0400)

422 - a common Lada Granta engine error indicates that the catalyst is clogged or its efficiency has critically decreased, may be accompanied by a drop in engine power, can be eliminated by replacing the module;
441 – the adsorber purge valve does not work correctly or is jammed;
443-445 – damage to the control lines of the above element;
458/459 – short circuit of the canister purge valve lines to ground or 12 volts;
480/481 – respectively for the first and second central fan control relays, open circuit or short circuit;
485 – the head fan is faulty or the module control has failed.

Grant error codes 8 or 16 valves, revealing software failures or mechanical damage to auxiliary units (0500)

500-503 – malfunction of the speedometer sensor, possible damage or short circuit;
504 - error p0504 Lada Granta indicates that the automatic brake pedal has failed;
505-507 – the engine idle speed regulator is faulty or clogged;
522/523 - error 0522 grant, just like p0523 tells the driver that the oil pressure in the crankcase compartment of the engine is outside normal limits;
560 – the battery may be discharged or the terminal has fallen off;
562/563 – exceeding or critically reducing the permissible voltage threshold in the on-board network.

On-board computer errors Grants indicating serious malfunctions in the engine control system (0600)

601/603 – malfunctions inside the ROM/RAM module, respectively, a complete replacement of the unit is required;
604 – incorrect calculation of the ROM controller amount;
606 – the ADC module is damaged and needs to be replaced;
607 – incorrect signal from the detonation channel controller;
615-617 – the starter relay is damaged or there are problems in the wiring;
627-629 – the fuel pump relay is turned off, or there are problems in the lines;
642/643 – incorrect operation of the bus supplying the sensors;
645-647 – air conditioner clutch relay failure or incorrect operation of the module;
660-662 – injection line length regulators are faulty or there is a short circuit in the on-board network;
691-694 – in fan relays No. 1 and 2 there is a short circuit with a contact to the on-board network, the car body, respectively.

Lada Granta errors, decoding for chassis

There is only one error No. P0830, which is responsible for the clutch lever switch. The appearance of the index indicates an open circuit or damaged wiring.

Additional control circuits for auxiliary equipment not related to the power plant (1000)

102 – the oxygen sensor heater in the exhaust system has failed;
115 – is responsible for the above module and indicates damage to the wiring;
123/124 – Additive problem with mixture correction for the air component, enrichment or depletion;
127/128 – similar value for the Multiplicative component;
135/141 – the wiring of the oxygen sensor No. 1/2, installed before or after the catalyst, is damaged;
136/137 – Additive problem with gasoline mixture correction;
171/172 – CO2 potentiometer is faulty;
301-304 misfire of the combustible mixture for cylinders 1-4;
335 – throttle malfunction, the drive may be jammed;
336 – throttle sensor mismatch;
384 – a similar value, indicates an incorrect reaction of the internal combustion engine to the position of the damper;
385 – critical excess load on the power plant;
386 – incorrect response of the fuel mixture detonation detection channel;
387 – the injection system is malfunctioning, the fuel supply time is incorrect;
388 – the position of the gas pedal and throttle valve do not correspond to each other;
389 – crankshaft rotation speed does not correspond to the damper position;
390 – a breakdown was detected in the device, but there was no response to it;
410/425/426 – canister purge valve, damage to the wiring with a short to ground or on-board network was detected;
500-502/541 – the main power supply lines to the fuel pump are damaged, there may be a short circuit;
509/513/514 – the lines of the XX regulator are damaged or the integrity of the winding is damaged;
545 – incorrect throttle position (mechanical damage);
558 – the return spring of the throttle drive is broken;
559 – is responsible for a similar module and indicates that it is incorrectly configured in a quiet position;
570/600 – there is no response from the immobilizer, the wiring may be damaged;
602 – error 1602 Granta appears when the contact on the battery is lost or there is a breakdown in the on-board network (voltage suddenly drops);
603 – the EEPROM unit is broken or there is no response from the module;
606 – the rough road sensor has failed or is producing incorrect data;
612 – it is not possible to reset Grant errors correctly;
616/617 – the rough road sensor has failed;
620/621/622 – failure of the ROM/RAM/EEPROM module;
640 – incorrect reading of the ECM memory;
689 – error memory is not read correctly or is damaged.

Auxiliary valves Grant 8 valve (2000)

100-103 – the throttle valve drive is broken or there is damage to the wiring;
105 – monitoring system is faulty;
122-123/127-128 – pedal position sensor A/B low or high value;
187-188 – incorrect adjustment of the fuel mixture at idle, lean or excessively rich;
135/138 – resynchronization of throttle/gas pedal position sensors;
176/178 – incorrect adaptation of the remote control drive;
270-271 – oxygen sensor No. 2 in the exhaust system does not respond to enrichment or leanness of the mixture;
301/304/307/310 – the ignition coil is closed to 12V, respectively, for all combustion chambers in series;
500/501 – generator excitation starts incorrectly.

Automatic transmission system errors (P0000)

717 – turbine speed is displayed incorrectly;
705-706 – the machine selector does not send or produces several signals at the same time;
720 – the tail shaft speed meter has failed;
973/974 – ON-OFF solenoid is shorted to the on-board circuit or body;
962-963 – pressure control solenoid is damaged;
731-734 – incorrect position of the gear ratio in gears 1-4, respectively;
711-713 – incorrect operation of the lubricant temperature sensor in the automatic transmission crankcase;
863 – establishing a bus connection;
701 – power supply to the head controller is broken.

Errors in the correct transmission of information from built-in modules (U0000)

001 – CAN bus failure;
009 – short circuit in the CAN circuit;
100 – the u0100 indicator shows that the Lada Granta BC error occurred at the junction of the ECU and internal combustion engine modules;
155 – cruise control module is broken or damaged;
305 – incompatibility of the program with the above device.

Brake pedal sensor Lada Kalina

Lada Priora Sedan constructor, assemble it yourself Logbook Mileage and clutch replacement

The Kalina brake pedal sensor is a technical device that is used to monitor the degree of impact on the brake pedal. Quite often, car owners of the VAZ line complain about breakdowns or incorrect adjustment settings of the product.

Fortunately, the process of adjusting or replacing a part is not very difficult if certain nuances are observed.

Performance diagnostics

Checking the functionality consists of: 1. Testing the product with a multimeter. 2. Disassembly and visual inspection of the internal components of the part.

3. Replacement sensor is not known to be good.

The first method involves alternately measuring the contacts of the dismantled sensor. The point is to check each contact individually and in pairs (second and third contact). This is quite convenient to do, since at the place where the contact chip is connected, all connectors are numbered.

The second method is used to identify faulty or deformed internal elements of the product (in most cases, damaged springs).

There should be no traces of oxidation or contamination. If there are any, clean them out.

The third method is quite simple and trivial. Install a new part to replace the one whose serviceability you doubt.

When the system is restored to normal operation, the malfunction indicator (check engine) should go out (if it does not disappear within 15 minutes, the error should be reset manually).

Signs of a faulty brake pedal sensor Lada Kalina

In order to understand that the Kalina brake pedal position sensor is the cause of the vehicle’s incorrect operation, pay attention to the following signs:

presence of error “P-0504” on the dashboard;
a significant decrease in power and engine responsiveness when pressing the gas pedal;
increase in engine speed (short-term) when changing gears.

Main causes of sensor failure

In order to identify the reasons that interfere with the normal operation of the device, it is necessary to disassemble it and carry out a thorough inspection to identify deformations and damage. The following defects are most common:

the internal (small) spring, which is located on the rod, shows signs of deformation or distortion;
the contact terminals of the product have physical oxidation;
backlash of the moving contact;
Quite low quality of factory production (defective, flimsy internal elements of the device).

Adjusting the brake pedal sensor Kalina

If the sensor is in good condition, and incorrect operation of the internal combustion engine continues to bother you, try adjusting the product yourself

Please pay attention to the following features:

The sensor must be screwed in clockwise until the brake pedal begins to move down. Then you will need to slightly unscrew the product and secure its position using the fastening nut.
The result should be such that when there is no action on the pedal, the sensor rod is recessed into the housing, and when the pedal is applied, on the contrary, it is completely released from the housing.
As for the working gap, it is adjusted using two nuts (one at the top, the other at the bottom). The adjustment is carried out using the upper nut, which is tightened, and the lower one, on the contrary, is unscrewed. The entire process is carried out until the button is completely recessed into the body when the brake pedal is applied. However, you should not overdo the adjustment; in other words, you should leave a small gap or travel margin (approximately 2 to 5 millimeters).

Removal and installation

Replacing the brake pedal sensor on Kalina is carried out using an adjustable wrench set to “19”. The sensor itself is located above the brake pedal under the steering column. Conventionally, the removal stages can be divided into 5 steps:

Before starting electrical work, it is recommended to disconnect the negative wire (terminal) from the battery.
Then you need to move into the car interior on the driver’s side. For ease of operation, it is advisable to move the driver's seat in the opposite direction from the dashboard.
Find the location of the sensor. Find a contact chip with wires. Press and hold the 2 plastic fasteners located on both sides of the chip. Pull the connector out of the sensor connector.
Take the wrench in your hands and loosen the fastening nut. After which the sensor can be unscrewed freely.
The installation process is similar to the removal procedure, except that you will need to make adjustments (tuning), the process of which is described in detail in the previous section.

Broken brake pedal sensor

One of the possible factors for error P0504 to appear in a car is a breakdown or defect of the pedal end switch itself. It is worth noting that the quality of AvtoVAZ consumables has always suffered, and this is the case now. Even Russian sensors are mostly equipped with fairly cheap springs and contacts made in China. The result is that the springs fail and the contacts usually burn out after 5-8 thousand miles.

Due to the spring, the regulator rod does not return to its original position, therefore, the system receives a notification that the brake pedal is pressed. In this situation, the ECU reads that both the brake and gas pedals are pressed together. Therefore, the throttle valve is forced to close.

In many cases, replacing the pedal adjuster on the Grant solves the problem associated with fault 0504. However, it happens that a working sensor refuses to work after installation, and then it is necessary to consider other possible causes.

Error P0504

Error code p0118

This malfunction is associated with an incorrect signal from the brake pedal switches. Most often, the cause of such a failure is a malfunction of the brake pedal position sensor, lack of proper adjustment, or a broken spring that is installed in this device. Procedure for checking and troubleshooting:

We remove the sensor;
Move the rod lock to the right position using a screwdriver;
We use a multimeter with an ohmmeter function;
On Largus, Vesta and Xray cars, contacts 3-4 should be closed and have a resistance close to zero. Contacts 1-2 are open and their resistance should tend to infinity.
When you press the rod on contacts 3-4, the circuit opens, and on contacts 1-2 it closes. If this is not the case, then the sensor must be replaced.
On Priora, Kalina, Granta, Niva cars, contacts 1-4 should be closed, and 2-3 open. When you press the rod, the situation is the opposite.
Before reinstalling the sensor, move the rod to the left position.

Sensor locations in video:

Watch this video on YouTube

Adjusting the brake pedal position sensor:

Any driver can carry out this procedure at home without a trip to a service station. The part has two nuts in its design. One of them is on top, and the second is on the bottom. The upper nut adjusts the pressure of the rod. First you need to release the lower one, and then tighten the upper one, thereby changing the gap of the element. You need to ensure that the rod is fully pressed and not partially pressed. After this, start the car and let it run for about 10 minutes to check if the error appears.