When diagnosing issues with a marine vessel, understanding fault codes is crucial. Gone are the days when you could simply tinker with engine parts to fix problems. Modern inboard marine engines are far more advanced and require precise diagnostics and calibrations when breakdowns occur. To properly connect to your engine and make the necessary repairs, a reliable marine diagnostic kit is essential to identify the exact cause of a malfunction.

Today, Triad Diagnostic Solutions is breaking down some key fault codes for a Volvo Penta engine—a popular inboard marine engine. We’ll also discuss the importance of fault codes in general.

What Are Fault Codes?

Fault codes, also known as Diagnostic Trouble Codes (DTCs), identify malfunctions in an engine. Marine technicians can read these codes by connecting a diagnostic kit directly to the onboard ports.

Why Are Fault Codes Important?

Fault codes are vital for shipyard and vessel maintenance, as they help monitor and assess engine health. By using these codes, marine technicians can quickly diagnose and address issues before they lead to breakdowns. Jaltest Marine diagnostic kits offer dealer-level functions like reading and clearing fault codes, bi-directional tests, parameter resets, troubleshooting and repair information, and technical specs like torque specifications, bolt patterns, and belt routing. These features enable a proactive approach to streamline maintenance and keep vessels in top shape.

How to Read Fault Codes

The first number in a fault code indicates whether it’s manufacturer-specific or a generic code that applies to all systems. The last three numbers provide information about the specific circuit or system affected.

Key Fault Codes for a Volvo Penta Marine Engine

Now that we’ve covered why fault codes are important and how to read them, let’s look at some critical codes specific to a Volvo Penta marine engine that can lead to breakdowns and serious damage:

  • Coolant Temperature (Code 6.1, PID/SPN 110): Triggered when coolant temperature is too high.
  • Oil Pressure (Code 6.6, PID/SPN 100): Triggered when oil pressure is too low.
  • Piston Cooling Pressure (Code 6.7, PPID 8/SPN 520192): Triggered when piston cooling pressure is too low.
  • Battery Voltage, CIU (Code 6.9, PID/SPN 158): Caused by a short circuit, faulty alternator, or faulty battery/battery cables.
  • Crankcase Ventilation Pressure (Code 7.7, PID/SPN 153): Triggered when crankcase ventilation pressure is too high.
  • Injection Pressure (Code 8.3, PID/SPN 164): Caused by faults in the fuel pump, fuel supply, harness, or sensor.
  • Pressure Valve (Code 8.3, PSID 97/SPN 679): Caused by leakage in the pressure release valve or the valve being stuck open or closed.
  • Preheating Sensor (Code 8.6, SID 70/SPN 729): Caused by faults in the cable harness or preheating relay.

Understanding Fault Codes with Jaltest Software

At Triad Diagnostic Solutions, we offer a range of diagnostic kits featuring Jaltest software that help you diagnose and repair marine vessels. Our Jaltest Marine Complete Diagnostics Full Kit includes features such as:

  • Real-time data monitoring
  • Automatic detection of systems and error codes
  • Bi-directional testing
  • Parameter reset capabilities
  • Customizable Condition-Based Maintenance and Service Scheduling

For accurate diagnosis of marine fault codes and issues, trust only the best tools. Browse our shop today to find the diagnostic tool that will transform your business or contact us to learn about our financing options.