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Oil Pressure – Engine Protection
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 143 PID: P100 SPN: 100 FMI: 1/18 LAMP: Yellow SRT: |
Oil pressure signal indicates oil pressure below the low engine protection limit. |
Power and/or speed derate and possible engine shutdown if engine protection shutdown feature enabled. |
 Oil Pressure Sensor Circuit
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Circuit Description
The oil pressure/temperature sensor is used by the electronic control module (ECM) to monitor the lubricating oil pressure. The ECM monitors the voltage on the signal pin and converts this to a pressure value. The oil pressure value is used by the ECM for the engine protection system.
Component Location
The oil pressure/temperature sensor is located on the engine block, below the exhaust manifold, and near the oil filter housing.
Shop Talk
- Confirm that the oil pressure/temperature sensor supply voltage is between (+) 4.75 and 5.25 VDC at the sensor.
- Verify, with the driver, the engine speed at which the fault occurs. If the engine is being operated at too low of a speed under load, the oil pressure can drop below the engine protection limits.
Refer to Troubleshooting Fault Code t05-143sn
Last Modified: 26-Oct-2010
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