Applicable Systems
PC200 Excavator
Symptoms
Engine output power decreased to protect engine; derate indicator active; limited RPM range.
Possible Causes
- Engine protection system active (oil temp/coolant temp)
- ECM detected condition requiring power reduction
- Sensor failure triggering protection mode
Troubleshooting Steps
- Step 1: Check all engine-related active codes (oil pressure, temp)
No other active engine codes - Step 2: Verify engine oil pressure at operating temp
Oil pressure 0.3-0.5 MPa at idle - Step 3: Check coolant temperature (normal < 105C)
Coolant temp within normal range - Step 4: Inspect oil and coolant level
Both at proper levels - Step 5: Clear E11 after resolving underlying condition
No derate, full power restored
How to Reset
Clear via monitor panel after resolving root cause of protection activation.
Common Replacement Parts
- Engine Oil Filter P/N: 600-185-4100
- Coolant Filter P/N: 600-185-4200
Frequently Asked Questions
- Q: Will engine recover power automatically?
If the protection condition resolves (temp drops, oil pressure recovers), power may restore. But code must be cleared to fully reset.
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Source: truckmanualshub.com Komatsu PDF
Category: Heavy Equipment
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