Marine Diesel Fault Codes
Sailboat auxiliaries, cruiser power, sportfisher and trawler engines. Yanmar JH-series and Volvo Penta D-series cover the bulk of pleasure-boat diesels; Cummins and CAT marine ratings cover commercial vessels and larger sportfishers. Marine diesels share most of the same SPN/FMI codes as their on-highway cousins, but you'll see marine-specific issues like seawater pump wear, bilge water alarms, riser and exhaust temperature limits, and EVC bus faults that don't exist on land.
21 marine codes documented· Yanmar / Volvo Penta / Cummins / CAT · Sail + power + commercial
Most Common Marine Diesel Codes
Showing 21 of 21 marine codes (Yanmar marine + Volvo Penta), sorted by severity.
VOLVO-PENTA-100-1 critical
Engine Oil Pressure Below Safe Limit Shutdown
VOLVO-PENTA-110-0 critical
Coolant Temperature High Shutdown Triggered
VOLVO-PENTA-190-0 critical
Engine Overspeed Shutdown, ECM Cut Fuel
VOLVO-PENTA-EXHAUST-TEMP-HIGH critical
Exhaust Gas Temperature Exceeded Safe Operating Limit
VOLVO-PENTA-SEAWATER-PUMP critical
Seawater Cooling Pump Failure Detected
YANMAR-MARINE-BILGE-WATER critical
Yanmar Marine High Bilge Water Alarm
YANMAR-MARINE-EXHAUST-TEMP critical
Yanmar Marine Exhaust Elbow Over-Temp Alarm
VOLVO-PENTA-110-15 serious
Coolant Temperature High Warning Active
VOLVO-PENTA-190-8 serious
Crankshaft Speed Sensor Signal Abnormal
VOLVO-PENTA-3251-15 serious
DPF Differential Pressure Sensor Reading High
VOLVO-PENTA-639-14 serious
EVC CAN Bus Off Fault Detected
VOLVO-PENTA-OIL-LEVEL-LOW serious
Engine Oil Level Low in Sump
YANMAR-MARINE-CRANKCASE-PRESSURE serious
Yanmar Marine Crankcase Pressure High
YANMAR-MARINE-ECU-COMM serious
Yanmar Marine ECU Communication to Helm Panel Lost
YANMAR-MARINE-FUEL-PRESSURE serious
Yanmar Marine Fuel System Low Pressure
VOLVO-PENTA-168-3 moderate
Battery Voltage Above Upper Limit Detected
VOLVO-PENTA-168-4 moderate
Battery Voltage Below Cranking Threshold Detected
VOLVO-PENTA-1761-1 moderate
DEF Tank Level Low Warning Active
VOLVO-PENTA-FUEL-LEVEL-LOW moderate
Fuel Level Below Warning Threshold Detected
VOLVO-PENTA-TROLLING-MODE-FAULT moderate
Trolling Mode Disabled, Clutch or Hydraulic Fault
YANMAR-MARINE-GLOW moderate
Yanmar Marine Preheat / Glow System Fault
Marine Diesel Brands
| Brand | Applications | Notes |
|---|---|---|
| Yanmar Marine | 3JH / 4JH / 4LV / 6LY / 6LP series sailboat and powerboat diesels | Common in cruisers, trawlers, and sailboats. JH-series 30-110HP for sail; LY/LP series 230-600HP for power. Codes via YEDS (Yanmar Electronic Diagnostic System). |
| Volvo Penta | D3 / D4 / D6 / D8 / D11 / D13 inline diesel; IPS pod drives and shaft applications | Cruisers, sportfishers, large yachts. EVC integrated electronic vessel control. Codes via VODIA. |
| Cummins (Marine) | QSB6.7, QSC8.3, QSL9, QSM11, QSX15 marine ratings | Commercial fishing, larger workboats. Same INSITE diagnostics as on-highway Cummins. Coverage in the main Cummins hub. |
| Caterpillar (Marine) | C7.1 / C9.3 / C18 / C32 marine ratings | Commercial vessels, sportfishers. CAT ET diagnostics. Coverage in the main CAT hub. |
Common Marine Diesel Issues
- Seawater pump impeller wear or strainer blockage -- causes rapid coolant temperature climb and exhaust riser damage
- Bilge water level high -- investigate for hull leak or stuffing-box leak immediately
- Engine overheat (110-0) on summer cruise from blocked sea strainer
- DEF system maintenance on Tier 3 marine SCR engines
- EVC / instrument cluster CAN bus off (639-14) -- bus terminator or harness issue
- Trolling mode fault on integrated marine transmissions
- Glow plug / cold start issues after winter layup