When this problem first occurs, it will probably take a couple attempts cranking the engine before it starts. This will make it difficult to start your vehicle. If you have a bad fuel rail pressure sensor, the ECU won’t send the right amount of fuel to the engine. P0190, P0191, P0192, P0193, and P0194 are the most common DTC codes indicating an issue with the fuel rail sensor. You probably won’t know it is the fuel rail pressure sensor at first but using a diagnostic scan tool can often confirm the issue. ![]() This doesn’t always mean the engine itself is bad, but rather something else in the vehicle which is not allowing it to do its job properly. This light activates whenever the engine control unit detects an issue within the vehicle that affects the engine in some way. When your fuel rail pressure sensor goes bad, the “Check Engine” warning light may illuminate on your dashboard. Here the 5 most common signs of a bad fuel pressure sensor. If there is a problem with the fuel rail pressure sensor, the engine control unit won’t be able to do its job properly. Top 5 Symptoms of a Bad Fuel Pressure Sensor Since most vehicles on the road today are made to be as environmentally friendly as possible, this makes the fuel rail pressure sensor a vital component that must remain functional at all times. Not only that, but the lifespan of emissions related parts decreases and excess carbon emissions are expelled into the atmosphere. ![]() If more fuel than necessary is injected into the combustion chamber, your fuel economy worsens. The engine control unit will specify the correct amount of fuel that the engine needs. This allows for optimal engine performance for the current driving conditions. As the sensor detects this information, the data gets transmitted to the engine control unit.įrom there, the computer will analyze the data and make the necessary changes to the timing of the fuel injections and the quantity of the fuel being injected. The purpose of this sensor is to keep track of the fuel pressure within the fuel rail.
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