Diesel Fuel Pressure Sensor Testing

Although the pressure sensor is often the cause of a p0452 or p0453 there are other possible causes.

Diesel fuel pressure sensor testing.

To check the ground wire check for voltage by back probing the connector with it connected. Testing the fuel pressure. Connect picoscope channel a to the signal circuit. Ensure the engine is stopped.

Glowshift tinted 7 color 30 psi fuel pressure gauge kit includes electronic sensor black dial smoked lens for diesel trucks 2 1 16 52mm 4 2 out of 5 stars 49 84 99 84. If this sensor isn t working correctly the computer gets false information and turns on the check engine light. Install the pressure tester to the test port when the engine is cold. Turn the ignition key and then the engine and record the pressure readings both times.

It should be about 0 5 volts. If the fuel rail pressure sensor does not output the correct voltage verify the 5 volt reference is present at the sensor. Using manufacturer s data identify the output signal circuit for the fuel rail pressure sensor. Start the scope to see live data.

Minimize the help page. A car with a port injected pump should yield a reading between 30 and 80 psi. You will see that picoscope has displayed an example waveform and is preset to capture your waveform.