Exhaust Pressure Sensor: Description and Operation

GF07.04-P-6130P Exhaust Back Pressure Sensor, Component Description
ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 221.0 /1, 251.0 /1 up to Model Year 2008
ENGINE 642 in MODEL 209.3 /4, 211.0 /2 /6, 219.3
ENGINE 642 in MODEL 463 up to 31.5.12





B60 Exhaust back pressure sensor

Location
The exhaust back pressure sensor is located at the engine at the rear left next to the left exhaust gas recirculation positioner (Y27/9).

Task
The exhaust back pressure sensor determines the exhaust back pressure upstream of the turbocharger. The pressure value is used by the CDI control unit (N3/9) to monitor the diesel particulate filter (DPF) fill level and for protection of the turbocharger and engine.





Function

1 Signal voltage
2 Sensor voltage (5 V)
3 Sensor ground

A Pressure gauge connection
B Diaphragm

B60 Exhaust back pressure sensor

The exhaust gas back pressure deforms a membrane, which affects a potentiometer. This alters the resistance value of the potentiometer and influences the signal voltage, which is used as information regarding the exhaust gas back pressure for the CDI control unit.