Series 50 – Section 26.4 Faulty Oil Pressure Gage Sensor

Section 26.4
Faulty Oil Pressure Gage Sensor

To determine if a faulty oil pressure gage sensor is causing low oil pressure, perform the following: ‪

1. Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure "Typical Display Data Line Adaptor" ; refer to OEM guidelines.
2. Start and vary the engine speed between 1800-2100 r/min.
3. Visually examine the DDR for oil pressure reading.
   1. If the DDR indicates oil pressure greater than 241 kPa (35 lb/in.² ), at 1800 r/min, shut down the engine and disconnect the DDR, check oil pressure gage sensor line for obstruction; refer to "26.5 Oil Pressure Gage Line Obstructed" .
   2. If the DDR indicates oil pressure less than 241 kPa (35 lb/in.² ), at 1800 r/min, shut down the engine; refer to "26.4.1 Oil Pressure Gage Sensor Replacement" .

Section 26.4.1
Oil Pressure Gage Sensor Replacement

Perform the following steps to replace the oil pressure gage sensor: ‪

1. Remove and replace the oil pressure gage sensor; refer to OEM guidelines.
2. Verify replaced oil pressure gage sensor; refer to "26.4.1.1 Test the Engine with Replaced Oil Pressure Gage Sensor" .

Section 26.4.1.1
Test the Engine with Replaced Oil Pressure Gage Sensor

Perform the following to determine if replaced oil pressure gage sensor resolved low oil pressure: ‪

1. Start and run engine speed at 1800 r/min.
2. Visually examine the DDR for oil pressure reading.
   1. If the DDR indicates oil pressure greater than 241 kPa (35 lb/in.² ), at 1800 r/min, shut down the engine and disconnect the DDR. No further troubleshooting is required.
   2. If the DDR indicates oil pressure less than 241 kPa (35 lb/in.² ), at 1800 r/min, shut down the engine and disconnect the DDR. Check oil pressure gage sensor line for obstruction; refer to "26.5 Oil Pressure Gage Line Obstructed" .