* Poor performance: This is the most common symptom. The engine might feel sluggish, lack power, hesitate during acceleration, or even stall. This is because the incorrect fuel delivery can lead to a lean or rich fuel mixture.
* Rough idle: An erratic or rough idle is another frequent sign. The inconsistent fuel delivery makes the engine struggle to maintain a stable idle speed.
* Check Engine Light (CEL): A malfunctioning fuel pressure sensor will almost certainly trigger the CEL, and a diagnostic trouble code (DTC) related to the fuel system will be stored.
* Poor fuel economy: Because of the inefficient fuel delivery, you'll likely see a decrease in your gas mileage.
* Misfires: In extreme cases, the engine might misfire, leading to rough running and potential engine damage if left unaddressed.
* No start: In some situations, a completely failed fuel pressure sensor could prevent the engine from starting at all. Though less common than the other issues.
It's important to note that the *severity* of these issues depends on how the sensor is malfunctioning. It might be sending a constantly low reading, a constantly high reading, or erratic readings. Each scenario will impact the engine differently. The only way to know for sure is to have the sensor diagnosed and replaced by a qualified mechanic.
