Volvo Penta D13 Operator's Manual page 51

19. Insufficient air supply to engine
- blocked filter
- leak between turbocharger and inlet manifold
- fouled compressor section in turbocharger
- faulty turbocharger
- poor engine bay ventilation
20. Coolant temperature too high
21. Coolant temperature too low
22. Oil level too low
23. Faulty/wrong propeller
24. Faulty engine mounting
25. Coolant level too low
26. Air in the freshwater system
27. Faulty circulation pump
28. Closed seawater inlet
29. Blocked seawater inlet, lines or filters
30. Defective impeller in the seawater pump
31. Defective thermostat
32. Clogged heat exchanger insert
33. Clogged charge air cooler
34. Lubricating oil level too high
35. Water entry into engine
36. High back pressure in exhaust system
37. Faulty engine speed sensor
38. Unacknowledged fault codes in the alarm list or ECU alarm list
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Fault handling
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