I have got error code P0090 coming up on my Peugeot Boxer van and over the last few days I've noticed that it is really struggling when going up hi?ls and feels really sluggish. The error code states... 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

If there is voltage and ground at the fuel pressure control regulator, obtain fuel pressure specifications from your vehicle information source and test fuel system pressure using the fuel pressure gauge. Carefully follow manufacturer’s recommendations for connecting the fuel pressure gauge. Observe fuel system data using the scanner while visually monitoring manual fuel pressure with the fuel gauge. If fuel pressure reflected on the scanner data display does not coincide with actual fuel pressure, suspect a faulty fuel pressure sensor. This trouble code tells us that there is an issue with the circuit and not that there is a problem with the fuel pressure. Depending on year, make, and model, DTC P0190 may have number of causes. Here are some of the most common.

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You may well find that you have gone as far as you can with your equipment that you have and that you have to resort to using dealer -or dealer level equipment to get to the bottom of this , that does happen sometimes. The diagnosis process of the P0190 code is pretty straightforward. You may need some special tools to procedure this diagnosis. If V ref is 4.5 – 5.5 V and Ground is 0 V, RPS should read between 0.5 V and 4.5 V. If otherwise, replace the sensor.

A diagnostic scanner, a digital volt/ohmmeter (DVOM), a suitable fuel pressure gauge, and a reliable vehicle information source (such as All Data DIY) will be necessary for diagnosing a code P0090. The electronic fuel pressure regulator is used to maintain a constant fuel pressure. Power is supplied to the controller via the PCM module (or the fuel delivery module along with the PCM), and the fuel pressure is monitored by the PCM via the pressure sensor. The fault codes you have - the P0190 are definately to do with fuel pressure - and without knowing the actual working figures - 5.2 bar does definately seem too high.On some modern cars, those equipped with high-pressure fuel injections systems, there are two fuel pumps. The low pressure (LP) pump is located in or near the fuel tank, while the high pressure (HP) pump is located on the engine. The LP pump usually runs between 35 and 75 psi, which is used to feed port fuel injectors, if equipped, and the HP pump. The HP pump uses mechanical energy, usually from a camshaft, to ramp up fuel pressure to feed the direct fuel injectors. The HP fuel pressure can range from 500 to 5,000 psi, depending on application. Diesel engines may or may not use an LP pump, which may put out something like 5 to 15 psi. The HP pump ramps up fuel pressure as high as 23,000 psi, depending on application. There are actually not that many things that can cause the P0190 code. It tells us that there is a problem with the electrical circuit to the sensor, which means something is wrong with any of these things.