BYD F0P0420 what s going on with the fault code

The reason for this failure** is that the catalytic efficiency of the three-way catalysis is lower than the lower limit. This is related to the usual fuel.

It is recommended to clean the three-way catalytic converter or replace the three-way catalytic converter.

Such a code 4S shop asks, the OP big head should be electrical appliances. It's not a big problem, you should be able to tell you if you ask, you can go to the small store, there is a kind of computer that can be used generally, shabu to play with Chinese characters, 50 yuan.

P0420 means exhaust pipe three-way catalytic converter failure.

There are 3 ways to quickly resolve the P0420 fault.

The first is: replace the original three-way catalytic converter of BYD F0, remember not to change the auxiliary factory, the auxiliary factory will not be on for a long time.

The second is to install a part like this part of the TDTAS faulty lamp to repair the data to remove the P0420 faulty lamp.

The third way is: use the car computer to enter the engine ECU background and turn off this P0420 fault (some cars can, some cars can't).

Of course, there are many other ways to solve it, if you want to solve it quickly, I recommend these 3, I hope it can help you.

Summary. The P120C fault code is the PCV System Diagnostic Valve - Open Circuit for Crankcase Forced Ventilation (PCV) Systems. Whenever the car is troubleshooting, the fault code needs to be cleared.

When the fault is cleared, it is necessary to clear the fault code according to the corresponding model, and it is necessary to pay attention to the negative wire of the battery to clear the fault. Otherwise, there may be two abnormalities mentioned below: first, cause some models of the control center computer to lose normal records, I believe we all know, many models of car computers are with automatic memory function, easy removal of the battery negative pole of the iron wire, will lose the engine operation data stored in the RAM, so that the car in the maintenance for a long period of time after the performance is not good, or after a period of driving, and now clear the fault **; Second, sometimes it will lead to some useful functions not working, such as the function of audio locking is one of the common situations, at this time, you need to decrypt the audio system according to the more cumbersome procedures, in order to restore the normal operation of the audio system.

Hello, I am helping you to inquire about the relevant information and will reply to you immediately.

The P120C fault code is the PCV System Diagnostic Valve - Open Circuit for Crankcase Forced Ventilation (PCV) Systems. Whenever the car is troubleshooting, the fault code needs to be cleared. When the fault is cleared, it is necessary to clear the fault code according to the specified fault code of the Bishen model, and it is necessary to pay attention to the fact that the negative pole of the battery cannot be removed casually to clear the fault.

Otherwise, there may be two abnormalities mentioned below: first, cause some drivers Huichang type control center computer to lose normal records, I believe we all know, many models of car computers are with automatic memory function, easy removal of the battery negative pole of the iron wire, will lose the engine operation data stored in the RAM, so that the car in the maintenance of a considerable period of time after the performance is not good, or after a period of driving, and now cleared the fault **; Second, sometimes it will lead to some useful functions not working, such as the function of audio locking is one of the common situations, at this time, you need to decrypt the audio system according to the more cumbersome procedures, in order to restore the normal operation of the audio system.

Fault **P0300, which is a fault of engine fire, is more complicated.

If it only occurs at low speed, there is no problem at high speed, and the fault light does not flash, give priority to checking the oil system, whether the gasoline filter is blocked, and whether the nozzle has carbon deposits and needs to be cleaned.

Only run about 10 kilometers a day, the car can not be completely heated every day, it is easy to cause carbon deposits in the engine valve, and the carbon deposits can be cleaned up by running about 4000 rpm at high speed.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy. The engine is suitable for both power generation units.

It can also refer to the entire machine including the power plant (e.g., gasoline engine, aero engine). The engine was first born in England, so the concept of the engine also originated from the English language, and its original meaning refers to the "mechanical device that produces power".

Hello! The P0300 fault code of automobile engine refers to the fault of engine detection multi-cylinder misfire. The fault system that produces this phenomenon includes the fuel injection system and the ignition system, which are basically faults of the circuit and electronic control, and it is recommended to find professional maintenance personnel for electrical and electronic control for testing and maintenance.

Hope it helps!

The fault code P0300 means: engine fire is not detected.

The possibility of causing the failure of **P0300 is: (1) The ignition coil corresponding to the relevant cylinder is in poor contact or the resistance is too large, and the ignition coil is damaged. (2) The sub-cylinder line of the relevant cylinder is leaking or open, and the spark plug gap is too large or too small, or there is carbon deposit between the electrodes.

3) Air flow. The powertrain control module detected a lower than normal air flow (MAF) sensor output causing the mixture to be too thin. (4) Air intake system.

Air leaking into the intake system bypasses the air flow sensor, resulting in a mixture that is too thin. The vacuum hose should be inspected for disconnection or damage. (5) The crankcase ventilation valve is improperly installed or faulty, or the throttle body, exhaust gas recirculation valve and intake manifold assembly surface leak vacuum.

6) The EGR valve is not working well, resulting in too thin mixture or too high exhaust gas recirculation flow.

Page 1. P0108: Inlet pressure sensor shorts to power supply.

Inlet pressure, balance force temperature. Sensor.

R Y engine ECM37B RWG

Auto Repair Manual. 01Connect the diagnostic device and adapter, and put the ignition switch to "ON".

Next. 02 Observe whether the "inlet pressure" item in the data stream is about 101kpa (with.

The body value is related to the air pressure at that time).

Yes, to step 5

No, next step.

03Unplug the connector of the air inlet pressure sensor on the wiring harness and check it with a multimeter.

Whether the voltage value between terminal 3 and 1 of the connector is about 5V.

Yes, to step 5

No, next step.

04Check the terminals of the ECM and the air intake.

Whether the line between the pressure and temperature sensor terminals is to the ground and the power supply.

Short circuit. Yes, repair or replace the wiring harness.

No, next step.

05Start the engine and idle it. Slowly press the throttle until it is close to full open, and observe the change in the value of the "intake pressure" item on the diagnostic instrument.

The change is not significant; Quickly press the throttle to near full open, at which point the display value should be.

It can reach more than 90kpa instantly.

Yes, diagnostic help.

No, replace the sensor.

Summary. The engine fault light is on, this is the engine is faulty, this may be the oil of the gasoline added is not good, or the engine burns badly, or there is a problem with the spark plug, or there is a problem with the ignition coil, it is likely to be caused by a problem with the oxygen sensor. It is also possible that the three-way catalytic converter is blocked.

This specific word is that it needs to be tested by the computer, and the maintenance is handled according to the fault detected by the computer.

Hello, don't worry, I can ask for your question, but wait a minute, I need text for about 2 minutes.

The engine fault light is on, this is the engine failure, this may be the oil quality of the gasoline added is not good, or the engine burns badly, or the spark plug has a spine problem, or the number of people is a problem with the ignition coil, it is likely to be caused by a problem with the oxygen sensor. It is also possible that the three-way catalytic converter is blocked. This specific word is that it needs to be tested by the computer, and the maintenance is handled according to the fault detected by the computer.

The fuel comes of poor quality, spark plugging from.

Caused by lack of cylinders.

The main reason for the engine failure light is that the throttle valve or the engine has too much carbon deposit, and the oxygen sensor has a faulty mixture ratio that causes the gas to be out of balance, which is easy to turn on the engine fault light. This has something to do with the carbon deposits that you clean the throttle valve to contaminate the sensor. If you're driving at a low speed in the city for a long time, this can easily happen.

It is also possible that the insulation layer of the high-voltage line is easier to be broken down after aging, which causes the engine fault light to be on, because the self-diagnosis system of the control unit generally does not make fault code indication for the high-voltage line, and it is more difficult to find when similar problems occur, and it is necessary to use a special diagnostic computer for special vehicles with experienced maintenance personnel for comprehensive detection.

The engine is therefore bai

The main reason for the lighting of the obstruction light is that the carbon deposit inside the throttle or engine is too much, and the proportion of the mixture is out of balance after the failure of the plate and the oxygen sensor, which is easy to turn on the engine failure light. This has something to do with the carbon deposits that you clean the throttle valve to contaminate the sensor. If you're driving at a low speed in the city for a long time, this can easily happen.

It is possible that the insulation layer of the high-voltage line is easier to be broken down after aging, which causes the engine fault light to be on, because the self-diagnosis system of the control unit generally does not indicate the fault code of the high-voltage line, and it is more difficult to find when there is a similar problem, and it is necessary to use a special diagnostic computer for a special car with experienced maintenance personnel to conduct a comprehensive test, I hope my answer will be helpful to you.

The reason for this failure** is that the catalytic efficiency of the three-way catalysis is lower than the lower limit. This is related to the usual fuel.

It is recommended to clean the three-way catalytic converter or replace the three-way catalytic converter.