The Honda CRV fault code is P0172, what is the solution to the over concentration of the fuel system

1. Check whether the fuel pressure is normal.

2. Check whether there is vacuum leakage in PCV valve, throttle body, carbon canister solenoid valve, intake manifold, brake booster and hose.

3. Check the water temperature sensor.

4. Check the air flow sensor.

5. Check the fuel injector.

The fuel system of the turboshaft engine is composed of a fuel pump, a fuel filter, a fuel injector, etc., to ensure the fuel flow required by the engine in various working conditions and various flight conditions.

The supercharged high-pressure fuel is controlled by the main fuel controller and the afterburner fuel controller (see fuel controller) respectively to meet the needs of the flight. Then, the main fuel is divided into the main and auxiliary oil circuits by the fuel distributor through the throttle switch, and is fed into the combustion chamber through the nozzle for combustion. When the engine needs afterburner, the afterburner fuel is fed into the afterburner chamber through the afterburner switch and nozzle.

The engine has an independent starting fuel system when starting, including a starting oil pump, a starting electromagnetic valve, and a starting nozzle. The oil spill system is used to remove fuel leakage from the sealed device and oil build-up in the combustion chamber. The oil drain system quickly releases fuel from the nozzle oil path after the engine is stopped to prevent carbon accumulation in the nozzle.

The fuel pump is the most important oil supply equipment in the system, and there are five types: gear pump, piston pump, rotary plate pump, centrifugal pump and steam core pump.

Check the oxygen sensor before checking! Look at the data flow! If it's okay, it is recommended to change the gasoline!

It shows that the car burns inadequately and the mixing ratio is poor.

The cause of this failure is insufficient oxygen (air) and intake pressure in the cylinder, resulting in insufficient combustion of fuel in the cylinder.

It is recommended to check whether the spark plug is in good condition, whether the intake pressure is enough (intake manifold pressure sensor parameters), whether the throttle valve is clean, and whether the three-way catalytic converter is blocked.

Now the car is electronically controlled engine, there are a lot of sensors to detect the working condition of the engine, and then the signal is fed back to the computer, after the computer analysis and comparison, and then to control the fuel injection ignition and air intake, if the engine sensor detection is problematic, the computer will report the fault code, to remind the owner, the engine needs to be tested and repaired, so we have to find out the cause of this failure, there are often the following reasons, for reference only: 1. The sensor is damaged, the contact is poor or the signal is interrupted; 2. Poor engine maintenance; 3. The quality of fuel and oil is not good; 4. The combustion of the mixture is insufficient; 5. Spark plug failure, ignition coil failure; 6. The fuel pump is faulty and the oil circuit is blocked; 7. The air conditioner filter is blocked.

The specific situation is analyzed as follows; 1. Sensor problems; The sensors mentioned here include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc., when these sensors are damaged, poor contact or signal interruption, the ECU of the car can not accurately obtain the engine data, at this time it will cause the engine fault light to turn on. 2. Maintenance problems; Poor engine maintenance is the most common cause of engine failure to light up. We know that the vehicle has a certain maintenance cycle, if the owner does not maintain on time, coupled with bad driving habits, then it will increase the burden of engine operation, and finally can only remind you through the fault light to care about your car 3, oil quality problems; The oil cleaning here includes fuel and engine oil, we know that the fuel filled by the car is generally marked and round, and the engine oil is also semi-synthetic and fully synthetic, manufacturers generally recommend the owner to use which grade of fuel, which type of engine oil, if the owner does not add as required, it will cause wear and tear of the engine in the long run, and the fault light is not to blame.

Poor combustion of the mixture; The failure of the spark plug, ignition coil, fuel pump, and oil circuit blockage of the engine will cause poor combustion of the engine mixture. Poor combustion of the mixture is caused by the problem of engine carbon deposition or knocking, and these will eventually be detected by the engine's oxygen sensor and reported to the ECU, which will naturally turn on the fault light to warn of the intake air intake problem; When the engine burns, it needs to take intake, the air filter element is very important in this process, if the air filter element of the car is not clean, it will affect the air intake of the car if it is not cleaned regularly, and it will be blocked for a long time, and if it is serious, it will cause the engine failure light to turn on. pressurization issues; Intake booster lines and turbochargers can also cause engine failure lights to illuminate.

The most common of these is turbocharger damage, while the vehicle can also experience symptoms such as oil leakage, high oil consumption, loss of power, metal noise, and blue or black smoke from the exhaust pipe. 7. Exhaust problems; Rear oxygen sensor, three-way catalytic converter, exhaust camshaft and bearing. The most common of these is a failure of the three-way catalytic converter that causes the engine failure light to illuminate.

The use of leaded gasoline, the use of leaded or silicone lubricant additives, the bump of the three-way catalytic converter, and the failure of the engine oil supply system are some of the factors that can easily cause the failure of the three-way catalytic converter.

Summary. Hello, the first thing to do is to take out the spark plug to see if it is black, that is, to detect whether it is really thick or a false alarm from the sensor. If it is really black when removed, it means that the mixture is thick, check whether there is any air leakage in the vacuum tube, and then look at the data flow of the air flow, the value is the displacement plus the left and right.

You can remove the air stream and wash it. Another is the front oxygen sensor to check whether it is distorted.

Hello, the first thing to do is to take out the spark plug to see if it is black, that is, to detect whether it is really dry and thick, or a false alarm from the sensor. If it is really black when removed, it means that the mixture is thick, check whether there is a leak in the vacuum tube, and then look at the data flow of the empty flow to see if it fails, and the value is the displacement plus the left and right. The mold calendar can remove the empty flow and wash it.

Another is the front oxygen sensor to check whether it is distorted.

The spark plug is not black.

How to look at the data flow.

If the spark plug is not black, it may be a false alarm of the sensor, first check whether the intake manifold has air leakage, the data flow is seen with a diagnostic instrument, and the engine is searched by the hand to find out the air flow, the front and rear oxygen voltage wheel start, and the data flow of the intake manifold pressure. It is currently judged to be pre-oxygen damage.

The gasoline pressure must not be lower than the bar.

Automobile fault code P0172 refers to the poor fuel repair and positive (mixing ratio), which can focus on checking the fuel pressure, whether the air intake system is leaking and blocked, and whether the sensor that detects the air intake volume of the air intake system is damaged, or the reason for the poor fuel quality.

P0172 A group of car fault code is mixed steam is too concentrated.

Fault code P0172 A group of mixed steam overconcentration refers to the oxygen sensor.

It was measured that there was too little oxygen in the exhaust gas (gasoline was too much).

Solution: Clean the throttle.

Replacement filter or oxygen sensor failure.

Summary. P0172 has been solved, that is, after the repair, the computer no longer reports the code. The fault code of P0172 in Honda cars is caused by excessive concentration of idle mixture.

The quality of the electronic control system and sensors of the Honda car is very good, and it will not be damaged easily, in this case, the throttle is cleaned first, and the fuel injector is re-matched with the throttle, which can be solved after cleaning. In the process of disassembling the throttle, check the pipeline between the air flow meter and the throttle, as well as the sealing condition behind the throttle, and after eliminating the air leakage fault, once the air leakage is found, repair and replace the damaged parts in time. Refers to the engine, the throttle injector needs to be cleaned every 40,000 kilometers, otherwise there will be idle shake and insufficient power and high fuel consumption.

Hello, this question can give you a perfect reply, wait for me to sort out the information, I'm typing, 2-3 minutes, don't finish.

P0172 has been solved, that is, after the repair, the computer no longer reports the code. The fault code of P0172 in Honda cars is caused by excessive concentration of idle mixture. The quality of the electronic control system and sensors of the Honda car is very good, and it is easy to be damaged by light field masking, in this case, the throttle is cleaned first, and the fuel injector is rematched and the throttle is lost, which can be solved after cleaning.

In the process of disassembling the throttle, check the pipeline between the air flow meter and the throttle, as well as the sealing condition behind the throttle, and after eliminating the air leakage fault, once the air leakage is found, repair and replace the damaged parts in time. Refers to the engine, the throttle injector needs to be cleaned every 40,000 kilometers, otherwise Songzhou will have idle shake and insufficient power and high fuel consumption.

The P2646 fault code means: a rocker actuator system performance or variable valve timing in the position that is stuck in the off position (row 1).

In the system, the rocker arm is the connecting camshaft.

and a device of the valve. The electronic control module can adjust the angle of the camshaft by changing the oil pressure to the actuator of the swing arm to ensure that the valve opens and closes at the optimal time. This optimizes the engine's efficiency and power across all rev ranges.

Summary. The P2646 fault code means:

aRocker actuator system performance or stuck in the closed position (1st row)In a variable valve timing system, the rocker arm is a device that connects the camshaft to the valve. The electronic control module can adjust the angle of the camshaft by changing the oil pressure to the rocker actuator to ensure that the valve opens and closes at the optimal time. This optimizes the engine's efficiency and power across all rev ranges.

Hello. P2646 Fault Code means: a rocker actuator system performance or stuck in the off position (1st row) In a variable valve timing system, the rocker arm is a device that connects the camshaft to the valve.

The electronic brake control module can adjust the angle of the camshaft by changing the oil pressure to the rocker actuator to ensure that the valve opens and closes at the optimal time. This optimizes the efficiency and power of the engine over all rev ranges.

The Honda CRVP0171-00 (45-2) is a mixture of super-dilute.

The main reasons for the dilution of mixed barricade gas:

1. Various air intake sensors cannot accurately detect the air intake volume, resulting in unsatisfactory fuel injection.

2. Too much carbon deposit, and the oil injection is adsorbed by carbon deposit.

3. The closed-loop control of the oxygen sensor fails.

Automobile mixture usually refers to the mixture of fuel and air, that is, the mixture of gasoline, diesel, etc. and air. If the concentration of the automobile mixture is too low, that is, there is more air and less fuel, and the car will have problems such as insufficient power.