How does a fuel rail pressure sensor work?
The fuel rail pressure sensor is typically of the three-wire, piezoelectric variety. Usually a 5-volt reference voltage signal and a ground signal are supplied to the sensor. As fuel pressure (at the sensor) increases, sensor resistance decreases.
What happens when fuel rail pressure is too high?
Fuel rail pressure sensor voltage is received by the PCM, which adjusts fuel pump voltage to accomplish the desired amount of fuel rail pressure. This promotes more efficient fuel consumption. If fuel rail pressure is higher than the amount programmed into the PCM, a P0088 will be stored and a service engine soon lamp may be illuminated.
How is the pressure in the common rail controlled?
Common Rail Injection System Pressure Control. Abstract: There are several approaches to control the pressure in the common rail. One early approach method was to supply more fuel than is needed to the common rail and use a pressure control valve to spill the excess fuel back to the fuel tank.
What causes a fuel rail pressure code of p0088?
Potential causes of a P0088 trouble code may include: Defective fuel pressure regulator Faulty fuel rail pressure sensor Shorted or open wiring and/or connectors in the fuel rail pressure sensor circuit A bad PCM or a PCM programming error
What is the diagnostic code for fuel rail pressure sensor?
P0193 is a diagnostic trouble code (DTC) for “Fuel Rail Pressure Sensor Circuit High Input”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
What does it mean when fuel rail pressure is too high?
P0088 – Fuel rail/system pressure too high Trouble Code Fault Location Probable Cause P0088 Fuel rail/system pressure too high Fuel pump, fuel pressure regulator, fuel
Potential causes of a P0088 trouble code may include: Defective fuel pressure regulator Faulty fuel rail pressure sensor Shorted or open wiring and/or connectors in the fuel rail pressure sensor circuit A bad PCM or a PCM programming error
What does it mean when fuel pressure sensor is too high?
It means that the signal is above the pre-calibrated limit for a pre-calibrated time made by the manufacturers. Technically, it can mean that either the fuel pressure is too high or there is a problem with the signal from the fuel rail pressure sensor.