MBE 4000 DDEC VI Troubleshooting – Section 15.4 Faulty Oil Pressure Gauge Sensor

Section 15.4
Faulty Oil Pressure Gauge Sensor

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

1. Install the Diagnostic Data Reader (DDR).

   PERSONAL INJURY ‪
   To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

2. Start and vary the engine speed between 1800 - 2100 rpm.
3. Visually examine the DDR for oil pressure reading.
   1. If the oil pressure is greater than or equal to 241 kPa (35 psi) at rated speed, shut down the engine. No further troubleshooting is required.
   2. If the oil pressure is less than 241 kPa (35 psi) at rated speed, shut down the engine; refer to "15.4.1 Oil Pressure Gauge Sensor Replacement" .

Section 15.4.1
Oil Pressure Gauge Sensor Replacement

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

1. Remove and replace the oil pressure gauge sensor; refer to OEM guidelines.
2. Verify oil pressure gauge sensor replacement; refer to "15.4.1.1 Test Replaced Oil Pressure Gauge Sensor" .

Section 15.4.1.1
Test Replaced Oil Pressure Gauge Sensor

To determine if replaced oil pressure gauge sensor resolved the low oil pressure concern, perform the following:‪

PERSONAL INJURY ‪
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked.‪

1. Start and run the engine at rated speed , if the oil pressure is 241 kPa (35 psi) or more, no further troubleshooting is required.
2. If the oil pressure at rated speed is less than is 241 kPa (35 psi), shut down the engine. Check for an obstructed oil pressure gauge line; refer to "15.5 Oil Pressure Gauge Line Obstructed" .