The presence of an on-board computer on the fourteenth VAZ model greatly simplifies the process of diagnosing some faults. Displaying error codes on the BC panel allows you to pinpoint the location of the malfunction. The functions of the built-in device include a self-diagnosis function that allows you to determine the entire list of problems in the machine systems. Often during such diagnostics, error 14 of the VAZ 2114 is displayed. To understand the method for eliminating the problem, it is worth knowing the decoding of the fault number “14”.
Useful video:
Cause of error 14 on VAZ 2114
In addition to built-in on-board computers, models 2114 and 2115 with an injector have an error detection function through the dashboard. By holding down the odometer button and turning the ignition to the first position, the self-diagnosis process begins. The functionality of the fuel gauge, tachometer, speedometer and coolant temperature needles will be checked.
Common error 14 on the VAZ 2114 means a high signal from the antifreeze temperature sensor (the so-called DTOZH).
The reason for the appearance of code “14” lies in the following points:
- The temperature sensor is faulty;
- There is a break in the DTOZh connection circuit;
- The error codes were summed up and displayed on the panel as the sum “14” (options for other faults should be selected);
- The insulation of the sensor is broken, as a result of which it no longer transmits correct readings.
Useful : Where is the DTOZH located on the VAZ 2114?
As soon as error code 14 appears on the instrument panel of the VAZ 2114, you should replace it or check the reliability of the wiring connection to the DTOZH. In the VAZ 2114 model (injector, 8 valves), this element plays a rather important role in the formation of the correct air-fuel mixture and is responsible for the timely activation of the cooling fan.
Decoding codes
As stated above, without deciphering error codes, diagnosing a vehicle is meaningless. Therefore, deciphering combinations should also be given attention. Especially if you don’t want to pay a lot of money to specialists at the service station for this. So, let's start with the combinations that appear during self-diagnosis of the car.
Self-diagnosis codes
| Combination | Deciphering the breakdown |
| 1 | Code 1 indicates a malfunction in the microprocessor. Sometimes the error is corrected by flashing the device. |
| 2 | The on-board computer reports incorrect operation of the gasoline level sensor in the fuel tank. There may be problems with the electrical wiring. |
| 4,8 | The voltage in the vehicle network is too high or too low. |
| 12 | Incorrect operation of the diagnostic lamp circuit. |
| 13 | The on-board computer stopped receiving a signal from the oxygen level monitoring device. |
| 14,15 | The control unit receives an incorrect signal from the antifreeze temperature sensor in the cooling system. In particular, the signal may be too low or too high. |
| 16,17 | When checking a car for errors, these combinations mean an incorrect on-board voltage indicator. it is necessary to carefully check the network for short circuits and breaks, since the voltage indicator is too high or very low. |
| 19 | The VAZ 2115 on-board computer receives an incorrect signal from the crankshaft position monitoring device. The circuit should be checked. |
| 21,22 | The VAZ 2115 control unit receives a very low or high signal from the throttle position control device. To eliminate the malfunction, you should check the functionality of the device itself, as well as diagnose the electrical wiring. |
| 23,25 | Intake air temperature control device. The control unit receives an incorrect signal from this sensor. The circuit should be checked, as well as the sensor itself. |
| 24 | The on-board computer stopped receiving a signal from the speed sensor of the VAZ 2115 vehicle. |
| 27,28 | These error combinations indicate the receipt of an incorrect signal from the CO sensor to the car control unit. It is recommended to check the circuit for opens and shorts or replace the sensor. |
| 33,34 | Mass air flow control device. These errors mean the receipt of an incorrect signal from the sensor, as a result of which it should be replaced. There is also a possibility of breaks in the circuit, so it makes sense to check the electrical wiring as well. |
| 35 | A malfunction has been detected in the operation of the idle air regulator. The sensor must be replaced to restore correct operation of the device. |
| 41 | The control unit receives an incorrect signal from the phase sensor. |
| 42 | This combination indicates a malfunction in the electronic ignition control wiring. Apparently, everything is in order with the ignition, but the circuit should be diagnosed. |
| 43 | The control unit received an incorrect signal from the knock sensor. You should check the device or diagnose the circuit for breaks. |
| 44,45 | In the injection system, the on-board computer recorded a lean or enriched composition of the combustible mixture. In this case:
|
| 51,52 | These combinations of faults indicate detected errors in the PROM or RAM devices. |
| 53 | The VAZ 2115 control unit stopped receiving a signal from the CO sensor. You should check the functionality of the device. |
| 54 | The signal from the octane corrector sensor has disappeared. |
| 55 | This combination indicates that when the car is moving, in particular when there is a high load on the VAZ 2115 engine, the combustible mixture in the injection system becomes leaner. In this case, the signs of failure may be the same as in the case of codes 44 and 45. |
| 61 | The oxygen sensor is broken. To restore system operation, the sensor must be replaced. |
Connecting special diagnostic equipment to the connector in the VAZ 2115 interior
Controller errors
The following are combinations of errors in the operation of controllers that arise when diagnosing a VAZ 2115.
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| Combination | Decoding |
| P0101-P0103 | These combinations indicate a malfunction of the mass air flow sensor. In particular, the signal may be increased or decreased. The device should be replaced. |
| P0112-P0113 | The intake air temperature sensor has been reported to have failed. It is necessary to check the electrical wiring, especially in places where the wires have been soldered. Apparently, the on-board computer is trying to inform you that a short circuit or break has occurred. |
| P0116-P0118 | These error codes indicate a malfunction of the antifreeze temperature sensor in the system. As a rule, in such cases, it is better to first check the electrical wiring, and if everything is in order with the circuit, then it is advisable to replace the sensor itself. |
| P2138, P2122, P2123, P0222, P0223 | These error codes indicate that the accelerator pedal position control device is not operating correctly. |
| P0201-P0204 | When such combinations appear, the on-board computer tries to inform the car owner that one of the injectors is not working correctly. In particular, an open circuit or short circuit may be detected in the system. |
| P0130 - P0134 | One of these combinations of numbers may indicate a malfunction in the functioning of the control oxygen sensor. To restore the operation of the sensor, you should check the circuit for breaks and short circuits, or you should replace the device. |
| P0136-P0140 | These errors indicate incorrect operation of the diagnostic sensor for monitoring the oxygen level in the injection system. As in the previous case, errors may indicate incorrect operation of the device or faulty wiring. |
| P0217 | Indicates overheating of the internal combustion engine. In this case, malfunctions may lie both in the operation of the motor itself and in:
|
| P0326-P0328 | The VAZ 2115 on-board computer informs the car owner about a detected breakdown of the knock sensor. In particular, such combinations may indicate not only the failure of the sensor, but also an incorrect signal coming from it to the control unit. |
| P0340-P0343 | Such combinations indicate a breakdown of the VAZ 2115 camshaft position control sensor. In particular, errors may mean:
|
| P0351, P0352, P2301, P2304 | These combinations mean incorrect operation of the ignition coils, namely, we are talking about an incorrect signal sent to the on-board computer. Also, these combinations may indicate a break in the electrical wiring or a short circuit in the circuit. |
| P0422 | The neutralizer device has broken down. |
| P0691, P0692 | The first cooling fan relay has failed. |
| P0693, P0694 | The on-board computer detected a breakdown of the second cooling fan relay. If the fuse is not replaced in a timely manner, the coolant may boil. |
| P0485 | The control unit receives an incorrect voltage signal from the cooling fan. |
| P0560-P0563 | The control unit has detected that the on-board voltage is too low or too high. |
| P0627-P0629 | These combinations may indicate either an incorrect signal from the fuel pump or a breakdown of the relay responsible for the operation of the unit. It is worth noting that if the fuel pump fuse breaks, operation of the vehicle will be impossible, since it will not be possible to start the engine. |
| P1602 | 1602 is a common VAZ error. Malfunctions have been registered in the operation of the engine control system controller. |
Reset error
Disconnecting the battery terminal to reset codes
If you have discovered and eliminated a malfunction, then it must be erased from the memory of the on-board computer. To do this, repeat the following steps:
- Stop the engine and turn off the ignition.
- Disconnect the terminals from the battery.
- Wait a few seconds and connect the terminals back to the battery.
How to resolve error 14?
Before starting work, you must make sure that the reason for the error display on the panel is the result of a sensor failure. If your car has problems with detonation, loss of engine power and increased consumption, you need to check the condition of the sensor. The cost of this element is low, so it is worth replacing it as a preventative measure. Incorrect readings from the DTOZ complicate the work of the car’s “brain”, because Accurate temperature readings are required to form the correct mixture. In general, DTOZH is considered one of the reliable elements in the control system, but it is worth replacing it periodically. The best way to resolve the error is to replace the sensor. If there is a wire break, then it is enough to restore the connection. We will describe the step-by-step process of replacing a faulty element below:
- Cool the engine and drain the antifreeze from the radiator and engine block. Unscrew the cap of the expansion tank.
- Find the desired sensor near the thermostat housing and mark its current position.
- Unscrew the sensor from its seat using a 21 key.
- Next, install the new element in accordance with the marked marks. Use a small amount of high temperature resistant sealant and apply it to the threads of the DTOZH.
- Pour new antifreeze or antifreeze into the system.
When diagnostics are running, a similar code, P2114, may be displayed. It means the TPS is malfunctioning. The problem is solved by replacing it completely.
Diagnostics using special equipment
The diagnostic process using special equipment consists of checking the car using a laptop. To connect to the diagnostic connector you will need a cable with an adapter. Using this cable, we connect the computer to the connector via USB output. For testing you will also need software; the power of the computer used is not important. There are many versions of different testing programs on the Internet.
Diagnostics is performed as follows:
- It is recommended to inspect the vehicle before starting the inspection. Check the volume of consumables - engine oil, brake fluid, coolant.
- Find the diagnostic connector and connect your laptop to it. If you have a special scanner, then that's even better. But since finding a scanner is not so easy, and buying one is not cheap, you can use a laptop. Before testing can begin, the ignition must be activated. There is no need to start the power unit.
- After connection, the testing utility starts. The software interface may vary. When you launch the software, graphs or a list of parameters with numbers may appear. This information will allow you to draw conclusions about the operation of the power unit.
- The scan starts. Fault codes will appear on the laptop screen. To decrypt, use the information provided in this article. We could not describe all the codes, but we deciphered those that occur most often. Usually, when downloading a program to a computer, users are provided with a separate file describing the faults.
- After decryption, the problem is repaired.
Is it possible to drive with error 14?
On domestic cars, on-board computer errors are displayed quite often during testing. You should not ignore the readings, because... Some malfunctions seriously affect the normal operation of the engine and other systems. It is acceptable to move with error “14”, but this is fraught with the following disadvantages:
- Increased fuel consumption;
- The engine operates in a changed temperature range;
- Antifreeze may boil in the expansion tank.
Malfunctions that arise in the engine cooling system should be corrected promptly, because Operating at elevated temperatures increases the likelihood of overheating. Please note that the error code may be displayed even after the problem has been resolved, because Data is still stored in the BC memory. Next, we’ll look at ways to reset data without using third-party devices.
How to reset errors on a VAZ 2114?
The procedure for resetting old problems without the presence of devices is extremely simple. The corrected error 14 on the dashboard is stored in the car's computer memory until the battery is disconnected. It is enough to remove the negative terminal from the battery for a few seconds and when checking again, the BC will not display any codes.
If “14” is still lit on the dashboard, check the car for other breakdowns, because Diagnostics in VAZ works on the principle of adding two error indicators into one sum.
