Causes of error P0101
- The mass air flow sensor sends a signal to the engine control module (ECM) that is out of range.
- The mass air flow sensor is not functioning properly due to damage or malfunction.
- Electrical wires or the MAF sensor itself are located too close to higher voltage components (such as the alternator, ignition wires, etc.) which can cause interference that affects the signal sent to the vehicle's ECM.
- The problem could also be damaged vacuum hoses, which can lead to various problems and other error codes.
- The MAF sensor must operate within a certain range to be able to send the correct signals to the vehicle's ECM, which is necessary for proper engine operation.
Tips to Avoid P0101 in the Future
Dirt and carbon deposits in the engine can cause many problems, including trouble code P0101. Check the air filter regularly and make sure it is installed correctly when replacing it. Regular maintenance of your engine fluids, especially oil, will also help keep your engine clean.
This code can also be caused by worn wire insulation. Make sure all wires are kept away from ignition coils and other potential sources of damage.
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Next Post Trouble P0100 - Mass Air Flow Sensor Circuit Malfunction
How does a mechanic diagnose a P0101 code?
When diagnosing this error, the mechanic will do the following:
- Connects the OBD-II scanner to the vehicle's diagnostic connector and reads all stored data and error codes
- Visually inspect the engine, then clear the fault codes from the computer's memory and test drive the vehicle to see if P0101 appears again.
If the error code appears again:
- Check the electrical connector of the mass air flow sensor for looseness.
- Check the electrical wires related to the mass air flow sensor for damage
- Find out if electrical wires or the MAF sensor itself are located too close to higher voltage components
Common errors on Lada Granta
But these are not the only mistakes that Lada owners encounter. Errors occur on both 8- and 16-valve engines. Here are some of them:
- p0503 – the speedometer is malfunctioning (read more about speedometer failure using the example of a Volkswagen Bora with an automatic transmission);
- p0422 – catalyst is clogged (what to do if the catalyst is troit);
- p0600 - the immobilizer does not respond, you should check the wiring or read what to do if the immobilizer does not pump the fuel pump;
- error p1701 on the Grant-automatic - faulty power supply circuit.
These are the main codes that Lada Granta owners may encounter. You should not neglect them; you must immediately take measures to eliminate them.
Common mistakes when diagnosing code P0101
- The most common mistake when diagnosing a P0101 code is to hastily replace the MAF sensor without first checking the associated electrical wires and connector for damage.
- It is also a mistake to neglect to check the mass air flow sensor for excessive carbon buildup before replacing it. Sometimes the problem can be solved by cleaning the sensor using a special cleaner designed for mass air flow sensors.
- Another mistake is neglecting to check the vacuum hoses for wear and damage.
Decoding combinations
Well, now it’s time to tell you about decoding fault combinations.
Diagnostic connector for connection to the on-board computer
Decoding codes after diagnostics with a scanner
As stated above, if the measured characteristics do not differ from the standard ones by more than 20%, then everything is in order with the car. What are the standard parameters?
| Parameter | Meaning |
| UACC | Shows battery voltage. To understand whether there is an error in this case, it is necessary to activate all devices that consume the most voltage. Allowable voltage is from 13.9 to 14.5V. If it is less, then it is necessary to check individual circuits of the network. |
| THR | Throttle position parameter. As a rule, if it is faulty, the driver will know about it without diagnostics, since the car will move jerkily and the engine power will constantly drop. Press the gas pedal without starting the engine, but turning on the ignition. The TPS readings should gradually increase to 90% (or slightly less). If everything is so, then the sensor is working; if not, it needs to be replaced. |
| FREQ | Crank pulley rotation speed parameter. The rotation speed is up to 840 rpm. If this sensor fails, the operation of the motor will be impossible. |
| AIR | Mass air flow parameter. It should not exceed 12 kg/hour. Start the engine and press the gas pedal so that the number of revolutions increases to 5 thousand per minute. In this case, the parameter should increase to approximately 250 kg/hour. Naturally, if the device is working properly, then the indicator will be like this. |
| UOZ | Represents the ignition timing angle. It should change in the range from 6 to 15 degrees. |
| INJ | This parameter bk represents the duration of the injection pulse (the time required to open each injector so that gasoline enters the cylinder). Ideally, this parameter should be between 3 and 5 milliseconds when driving at neutral speed. If the readings obtained during diagnostics are much higher, then, most likely, the injectors are already clogged and need to be cleaned. Or this indicates low gasoline pressure as a result of a clogged gasoline filter or pump. Press down the gas pedal sharply. The injection time should increase to 20 ms. Ideally, accurate diagnosis of injectors is only possible using a test bench. |
| FSM | Idle speed sensor performance indicator. Ideally, this parameter should not exceed 50-60. If you press the gas pedal sharply, it can increase to 160-180. |
| ALAM 1 | Indicates the voltage level recorded on the oxygen level monitoring device. When the car engine is warmed up, this indicator should increase from 0.007 to 0.7 V. If this indicator differs, then something is wrong with the circuit. |
| LUMS_W | This coefficient indicates the rotation of the crank pulley. Ideally, it should vary around 4 revolutions per second. If it is slightly larger, then this already indicates a misfire in the engine cylinders. This means that you should pay attention to checking the spark plugs (whether they are working, filled or not), as well as the condition of the high-voltage wires. |
| QT | Gasoline consumption coefficient. With the engine running and idling, it should not exceed 0.9 liters per hour. |
It will be useful: How to set the ignition on UAZ 469 video
Deciphering codes for self-diagnosis
Checking instrument panel sensors before diagnostics
| Code | Description |
| 1 | This code indicates an excessively high voltage detected by the bk in the on-board circuit of the Lada Grant. |
| 2 | If there is a break in the gasoline level sensor circuit for twenty seconds, then this code indicates the need to check the network. |
| 3 | This code indicates the need to replace the refrigerant temperature control device in the refrigeration system. |
| 4 | Something has happened in the operation of the air temperature control device; the circuit needs to be checked or the sensor replaced. |
| 5 | Code 5 indicates overheating of the internal combustion engine. In this case, the problem may be a broken thermostat. In addition, this code may indicate more complex failures. For example, if the cylinder head gasket is broken, the engine will also overheat from time to time. |
| 6 | This indicates an emergency pressure of the engine fluid in the injection system. |
| 7 | Indicates a malfunction in the brake system. |
| 8 | Battery malfunction. Code 8 tells the owner of the Lada Grant that the battery needs to be replaced due to the charge being too low. |
Most common mistakes
Below is a breakdown of the most common error codes encountered when diagnosing a Lada Granta.
| Error code | Description of the malfunction |
| P0106 | The error code indicates an incorrect wiring signal coming from the absolute motion sensor. |
| P0107, P0108 | These error codes indicate a very low or high signal coming from the intake manifold pressure control device. |
| P0112, P0113 | These error codes on the State X1 on-board computer indicate a breakdown of the intake air flow temperature control device. Or this may indicate an incorrect sensor signal. |
| P0115 - P0118 | One of these error codes may indicate that the refrigerant temperature sensor is not functioning properly. In addition, this may indicate an incorrect signal coming from it. You should check the circuit and operation of the sensor itself. If it shows too high a result, and the antifreeze in the expansion tank does not boil, then most likely the problem is with the sensor. |
| P0122, P0123 | Incorrect signal from the TPS, the device and its circuit should be checked. |
| P0131 - P0135 | These error codes on the on-board computer indicate a breakdown in the operation of the oxygen level control device before the converter. As in previous cases, it is necessary to check the circuit, and then diagnose the sensor itself. |
| P0171, P0172 | We are talking about too low or high level of the combustible mixture. |
| P0301 - P0304 | The Lada Grant's on-board computer tells the owner that a misfire has been registered in one of the engine's four cylinders. |
| P0325 | The knock sensor is not functioning correctly or the Lada Grant on-board computer has detected a break in its circuit. |
| P0645, P0647 | BC reports the need for additional diagnostics of the climate system clutch relay. It is possible that the relay itself may break down or the circuit may break in one of the sections, which requires additional testing. |
| P0660 - P0662 | A failure or open circuit of the intake system channel length control valve is reported. |
| P0830 | Damage to the clutch system. Perhaps the pedal switch itself or another element of the system is faulty. But in this case everything will be fine with the chain. |
| P1102 | The oxygen sensor heater gives a too low signal, which the on-board computer warns the car owner about. |
Transmission malfunctions
| Code | Description of the error |
| P0717 | In this case, the BC reports incorrect operation of the turbine speed control device. |
| P0706, P0705 | The on-board computer reports the absence of a signal or several simultaneous signals coming from the automatic transmission selector. |
| P0720 | A failure of the output signal speed control device has been registered. |
| P0973, P0974 | BK detected an open circuit or short circuit in the wiring of the gearbox on/off solenoid. |
| P0962, P0963 | The motorist is notified of an open circuit or incorrect signal coming from the transmission pressure control solenoid. |
How serious is P0101?
- When the P0101 error code appears, there are usually no serious problems with the vehicle's drivability, however, if this code is detected, it is recommended that you contact a qualified technician as soon as possible to diagnose and repair the error.
- Under certain circumstances, damage or failure of the mass air flow sensor can lead to increased fuel consumption, unstable engine operation, and problems starting the engine. In some cases, damage to internal engine components may occur.
- Often, if the Check Engine Light comes on immediately after starting the engine, the OBD-II system can be reset and the vehicle will continue to operate normally.
Choosing an on-board computer for the Lada Granta
As an alternative to the weak standard BC, car enthusiasts install multifunctional on-board monitors that will show not only the engine temperature, but also many other parameters. Today, manufacturers can offer three main devices suitable for the VAZ 2190-91: “Multitronics”, “Orion”, “State”.
"Multitronics"
The device is a universal one, since the manufacturer does not produce them exclusively for Grants. Judging by the documentation and instructions included with the device, installation of Multitronics is quite possible on earlier VAZ cars: first-generation Kalina and Priora. Finding a place to install the device is the concern of the car owner.
"Orion"
The computer of this brand is also universal and is used not only for Grants. The installation site may have to be modified independently.
This company produces on-board computers exclusively for domestically produced cars. The devices are not created for universal use, but specifically for each car model.
"Stat" is based in Togliatti and tests all its developments on AvtoVAZ cars. Installed instead of a plug for additional buttons. This device is modest in size, but has additional useful functions:
It will be useful: Changing the oil in the gearbox on a Lada Granta with a cable drive: video “State” X1 M is inexpensive, thanks to which it noticeably outperforms its competitors. But if you need a full-fledged on-board computer with a display and an intuitive interface, you should take a closer look at universal devices.
Installing a BC can pay for itself after the first replacement of a sensor, because the car owner will be able to carry out diagnostics on his own.
What repairs can fix the P0101 code?
To resolve error P0101, you may need to:
- Check for the presence of the error code using a scan tool, clear the code from the computer's memory, and test drive the vehicle to see if the P0101 code appears again
If the error code appears again:
- Reconnecting, Repairing, or Replacing the Mass Air Flow Sensor Electrical Connector
- Repair or replacement of electrical wires related to the mass air flow sensor
- Replacing worn or damaged vacuum hoses
Additional comments for troubleshooting P0101
- Many high-mileage vehicles have short-term problems with sensors, which usually occur when the engine is started or the transmission is subjected to prolonged stress.
- Often, if the Check Engine Light comes on but the vehicle continues to operate normally, the OBD-II system can be reset and the problem will be resolved. This is why it is important to check for an error code using a scanner and clear the code from the computer's memory before performing any repair work.
On which cars is this problem most common?
The problem with code P0101 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:
- Alfa Romeo
- Audi (Audi a8, Audi q7)
- BMW (BMW X3, BMW X5)
- Cadillac
- Chery (Chery Tiggo, QQ)
- Chevrolet (Chevrolet Aveo, Captiva, Lacetti, Tahoe, Epica)
- Citroen (Citroen Jumper)
- Daewoo (Daewoo Winstorm)
- Dodge
- Fiat (Fiat Albea, Doblo, Ducato, Panda, Stilo)
- Ford (Ford Kuga, Mondeo, Ranger, Transit, Focus)
- Honda
- Hummer
- Hyundai (Hyundai N1, Getz, Grand Starex, Porter, Santa Fe, Starex, Tucson, ix35)
- Isuzu (Isuzu Rodeo)
- Jaguar
- Jeep (Jeep Grand Cherokee)
- Kia (Kia Bongo, Carnival, Magentis, Sid, Sorento, Sportage)
- Land Rover (Land Rover Range Rover)
- Lexus
- Mazda (Mazda 3, Mazda 5, Mazda 6, Mazda cx7)
- Mercedes (Mercedes Viano, Vito, Sprinter, w203, w211)
- Mitsubishi (Mitsubishi Fuso)
- Nissan (Nissan Beetle, X-Trail)
- Opel (Opel Antara, Astra, Insignia)
- Peugeot (Peugeot Boxer)
- Renault
- Saab 9-5
- Skoda (Skoda Octavia)
- Suzuki
- Toyota (Toyota Avensis, Camry, Corolla, Land Cruiser)
- Volkswagen (Volkswagen Passat, Touareg, Touran, Tiguan)
- Volvo (Volvo s60, xc70, xc90)
- VAZ 2114, 2115
- Lada Granta, Kalina, Niva, Priora
- UAZ Patriot
With fault code P0101, you can sometimes encounter other errors. The most common are the following: P0106, P0107, P0111, P0171, P0174, P0300, P0420, P0430, P2004, P2178, P2180.
