Diesel Pressure Sensor Testing

Aftertreatment diesel particulate filter differential pressure sensor dpf delta p the variable ca pacitance dpf exhaust pressure sensor has two ports that monitor the exhaust gas pressure across the diesel particulate differential pressure orifice.

Diesel pressure sensor testing.

When problems arise it s more likely that the vacuum hose has failed. Clean and replace as needed. This signals that the automobile s engine is receiving too little oil pressure or the sending unit. The oil pressure sensor often referred to as the oil pressure sender is a unit responsible for telling a vehicle s computer the oil pressure.

If the sensor reads within 5 psi of the others check the tube passages and sensor for carbon build up or restriction. The sensor monitors and measures the pressure with the egr valve. When testing a map sensor first make a preliminary check. The sensor connects to the intake manifold with a rubber hose depending on your particular application.

One port is located on each side of the dpf. Exhaust pressure sensor 1 performance. Perform the enhanced injector return test. It controls the gauge on a vehicle which lights up as a warning indicator.

Disconnect the fuel rail pressure sensor the fuel pressure should be greater than 175 mpa as displayed on the scan tool. If the exhaust pressure sensor is skewed replace it and retest. How to test a map sensor. Any voltage above or below these values for example either at 0 v or 5 v will indicate that the sensor has failed.

The differential pressure feedback exhaust sensor or dpfe sensor is part of the vehicle s exhaust gas recirculation egr system. With a scan tool compare available pressure parameters with the key on engine off. Otherwise it connects directly to intake. Testing the pressure sensor the location varies from the bulkhead under the bonnet back of the engine or underneath near the dpf above the subframe you will find 3 wires for the connector which plugs into the sensor.

If these codes set only on hard acceleration or when pulling a hill with a load check fuel supply issues first. This prevents the valve from malfunctioning and allowing too much exhaust into the intake manifold at one time.