If you are getting code P0190 FRP sensor itself is likely faulty, other possibilities include a damaged connector to the FRP sensor and a damaged wire harness. In rare cases, it may indicate a problem with the ECU or fuel pump.
Under the Engine Control Unit, live sensor data, we found a zero reading from the fuel rail pressure sensor. The Engine Control Unit showed a current P0190 code, which in this case was caused by a zero reading from the Fuel Rail Pressure (FRP) sensor. Zero readings can be either due to damaged wires or failed sensors. This guide provides procedures on how to troubleshoot code P0190 on a Volkswagen.
Fault code P0190 indicates an electrical problem with the fuel rail pressure sensor. Code P0190 is unlikely to be caused by a mechanical problem. P0190 is a generic trouble code, meaning it applies to Volkswagen and all vehicles 1996 and newer equipped with OBD-II.
Symptoms that are often present when code P0190 is current:
- Check engine or service engine soon light on.
- The engine is hard to start.
- Engine stalls at idle
- Engine cranks but won’t start.
- Poor acceleration
- Lack of power
- Engine stalling
Potential problems that can cause the P0190 fault code:
- Faulty Fuel Rail Pressure (FRP) sensor
- Damaged, loose, or corroded FRP sensor connector
- Damaged wire harness
- Fuel pump issues or fuel pump relay
- Dirty fuel filter
Fuel Rail Pressure Sensor Location
The fuel rail pressure sensor is located on the engine. Once you remove the engine cover, you can see the fuel rail. The fuel rail pressure sensor is mounted on the fuel rail.
If you are getting fault code P0190, check for power at the sensor. You should get five volts at the sensor with the ignition on. Check continuity for the sensor itself using a digital multimeter. If the car doesn’t start, use a fuel pressure gauge to measure the fuel pressure. Without starting the engine, turn the ignition key to the on position, and you should get around 45 or 60 psi (DPI) for direct port injection systems.
If the sensor sends values out of range, fault code P0190 will be stored as active, and the check engine light will come on. It is more likely that you will have a faulty sensor or damaged wires (high resistance). Fault code P0190 comes on when a Fuel Rail Pressure (FRP) circuit malfunctions. The Engine Control Unit (ECU) will detect that the fuel rail pressure sensor has an open circuit or is operating outside the normal range and show code P0190.
We hope you find the VW P0190 Code Fuel Rail Pressure Sensor Causes | Location guide helpful. Check these troubleshooting and repair guides for more help on your Volkswagen.