5 Major Symptoms of a Broken Fuel Pressure Sensor

by MOU YONG HONG on December 01, 2021

The fuel rail sensor (commonly called the fuel pressure sensor) is one among the various components of the engine and is typically utilized in diesel and certain gasoline-injected vehicles. it's a part of the vehicle equipment and aims to watch the fuel pressure on the fuel rail. This sensor is typically located near the center of the fuel rail and is linked to the engine control unit (ECU), which is that the vehicle's central computer. don't confuse it with the fuel tank pressure sensor located inside or above the fuel tank.

As a maintenance technician or engineer, allow us to understand the function of the fuel pressure sensor and customary symptoms together to seek out the faulty fuel pressure sensor.

The main function of the fuel pressure sensor

The main purpose of the fuel pressure sensor is to trace the fuel pressure within the fuel rail. When the sensor detects this information, the info is going to be transmitted to the engine control unit. From there, the pc will analyze the info and make the required changes to the timing of the fuel injection system and therefore the amount of fuel injected. this enables to get the simplest engine performance under current driving conditions. The engine control unit will specify the right amount of fuel required by the engine. If an excessive amount of fuel is injected into the combustion chamber, fuel economy is going to be greatly affected.

Not only does it affect emission-related components, but its lifetime is additionally reduced. Excess carbon emissions are discharged into the atmosphere, causing tons of environmental pollution.

At present, people's awareness of environmental protection is getting higher and betterand therefore the requirements for environmental protection of the vehicle volume also are strengthened. Therefore, this makes the fuel rail pressure sensor an important and important part, and it should function normally.

5 major symptoms of fuel pressure sensor damage

If the fuel rail pressure sensor fails, the engine control unit won't work properly. this is often the 5 commonest failure phenomena of fuel pressure sensor damage.

the facility drops and therefore the acceleration is slow

If you tread on the accelerator and therefore the vehicle doesn't accelerate, needless to say, there could also be a drag with engine performance. The failure of the tracking sensor may make the air-fuel ratio abnormal and cause performance problems within the vehicle, because the pressure sensor cannot transmit accurate information and can't meet the fuel demand of the engine, leading to a decrease in power and slow acceleration.

2. Check whether the engine light is on

When the fuel rail pressure sensor is broken, the "check engine" red light on the dashboard could also be lit. If the engine computer detects a drag with the fuel rail sensor signal OR circuitit'll close up the "check engine light" to notify the driving force of the matter. The Check Engine indicator also can be activated by various other problems, so it's strongly recommended to scan the pc for fault codes.

P0190, P0191, P0192, P0193, and P0194 are the foremost common DTC codes that indicate a drag with the fuel rail sensor.

3. Engine engine start is difficult

The symptom of a possible problem with the fuel rail sensor is difficulty in starting. A malfunctioning fuel rail sensor may send an incorrect signal to the pcwhich can cause the engine to experience a difficult start. The engine may crank a touch longer than the traditional beginning, and in additional severe cases might not start in the least.

When this problem occurs for the primary time, it's going to take several attempts to start out the engine. However, if the matter of starting difficulty occurs repeatedly, more and more attempts are going to be needed to start outwithin the end, the engine couldn't start in the least.

4 Decreased fuel efficiency

If the fuel pressure sensor doesn't work properly, you'll find that fuel economy and mileage are greatly reduced.

The engine control unit sends an excessive amount of fuel to the combustion chamber through the fuel rail, or insufficient fuel is shippedyou'll quickly find that there are more gasoline station trips and extra money is going to be spent on gas.

5 stall

As the fuel rail pressure sensor deteriorates, engine stalls may occur. you're driving, then suddenly, the engine will stall. it's going to also stall when idling.
This will make driving extremely difficult (dangerous), and urgent measures must be taken for your safety. for instance, take the vehicle to the closest car repair point and replace the sensor just in case.

Although not all fuel rail sensors are often found on all vehicles, they will be found on all vehicles, but they play a crucial role in engine management functions. If your vehicle shows any of the above symptoms, otherwise you suspect a drag with the fuel rail sensor, please have a knowledgeable technician (such as a VEP Engine parts technician) diagnose the vehicle to work out whether the sensor should get replaced.


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