Volvo Penta D13 Series Operator's Manual page 78

Fault Handling
19. Insufficient air supply to engine:
- blocked air filter
- air leakage between turbocharger and engine inlet manifold
- fouled compressor section in turbocharger
- faulty turbocharger
- poor engine bay ventilation
20. Excessive coolant temperature
21. Too low coolant temperature
22. Too low oil level
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/pipe/filter
30. Defective impeller in seawater pump
31. Defective thermostat
32. Blocked heat exchanger insert
33. Blocked aftercooler
34. Too high oil level
35. Water entry into engine
36. High back pressure in exhaust system
37. Faulty engine speed sensor
38. Stored fault codes
39. Non-return valve in feed pump leaks
40. Alternator drive belt slips/broken
41. Check that the AUX stop button on the engine is in the RUN position (not depressed)
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