The ECM detects all of the following conditions:
- The engine has been running for at least 10 seconds. This 10 second delay begins once the engine speed is greater than 0 rpm.
- Engine oil pressure is below the trip line in Illustration 1 for two seconds.
- 100-03 Engine Oil Pressure open/short to +batt is not active.
- 100-04 Engine Oil Pressure short to ground is not active.
- 100-13 Engine Oil Pressure calibration required is not active.
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| Illustration 1 | g00758873 |
System Response:
The ECM will log the derate. The ECM derates the engine power by a maximum of 35 percent. The ECM will restore full power when the engine oil pressure rises above the reset line for two seconds.
- Low power
- There may be a problem with the engine lubrication system.
- There may be a problem with the engine oil pressure sensor.
Test Step 1. Check for Diagnostic Codes.
- Connect ET to the service tool connector.
- Turn the keyswitch to the ON position. The engine should be off.
- Check for any active diagnostic codes or logged diagnostic codes.
Expected Result:
There should be no diagnostic codes that are present.
Results:
- OK - Proceed to Test Step 2.
- Not OK -
Repair: Repair the diagnostic codes that are present. Refer to the appropriate topic in the "Troubleshooting With a Diagnostic Code" section of this manual.Ensure that the repair eliminates the problem.
STOP
Test Step 2. Perform a Check of the Engine Lubrication System.
- Perform a check of the engine lubrication system. Refer to Troubleshooting, "Low Engine Oil Pressure".
Expected Result:
There are no problems with engine oil pressure.
Results:
- OK - There may be an intermittent problem.
Repair: Monitor the operation of the engine.Repair the problem.Ensure that the repair eliminates the problem.
STOP
- Not OK -
Repair: Repair the problem.Ensure that the repair eliminates the problem.
STOP