Volvo Penta Standby Generators Error Codes

ECU 1.1

Engine will not crank; control panel shows ECU 1.1 and start command is ignored or aborted immediately.

ECU Power Supply Fault

ECU 1.2

Engine cranks but will not start; ECU 1.2 displayed; sometimes starts then stalls immediately.

ECU Main Relay or Ignition Relay Fault

SPN 100 FMI 1

Low oil pressure alarm; engine may shut down shortly after start; oil pressure gauge near zero.

Low Engine Oil Pressure

SPN 100 FMI 3

Oil pressure sensor fault; ECU logs implausible oil pressure reading; engine may not start or may derate.

Oil Pressure Sensor Circuit Fault

SPN 102 FMI 1

Low intake manifold pressure; black smoke and loss of power; turbo boost below expected.

Low Turbocharger Boost Pressure

SPN 102 FMI 2

High intake manifold pressure reading; ECU logs boost sensor fault; possible derate.

Boost Pressure Sensor Circuit Fault

SPN 110 FMI 0

High coolant temperature alarm; engine may derate or shut down; temperature gauge in red zone.

Engine Overheating

SPN 111 FMI 1

Engine shuts down or will not start; coolant temperature reading is implausible low or high; ECU logs coolant temp sensor fault.

Coolant Temperature Sensor Circuit Fault

SPN 157 FMI 3

Engine shuts down or will not start; code indicates low system voltage; control panel may flicker.

Low DC System Voltage

SPN 157 FMI 4

High voltage alarm; ECU logs system voltage too high; possible burning smell from batteries or charger.

High DC System Voltage

SPN 168 FMI 0

Engine shutdown with generic engine protection alarm; multiple parameter limits exceeded.

Engine Protection Shutdown

SPN 171 FMI 1

Intake air temperature reading implausible; ECU logs IAT sensor fault; possible derate.

Intake Air Temperature Sensor Fault

SPN 190 FMI 0

Engine speed overshoot or overspeed shutdown; ECU logs high RPM; generator trips offline.

Engine Overspeed

SPN 190 FMI 1

Engine speed signal lost; ECU logs no RPM; engine may crank but not start or may shut down.

Engine Speed Sensor Circuit Fault

SPN 3055 FMI 2

Generator fails to take load; ECU logs CAN communication error with generator control module.

CAN Bus Communication Fault

SPN 3216 FMI 9

DEF/AdBlue system fault; engine derates; warning about SCR system malfunction.

SCR/DEF System General Fault

SPN 4334 FMI 1

DPF differential pressure too high; ECU logs DPF restriction; engine derates and exhaust temperature rises.

Diesel Particulate Filter Restriction

SPN 4364 FMI 0

High exhaust temperature alarm; ECU logs EGT above limit; possible smell of very hot metal.

Exhaust Gas Overtemperature

SPN 629 FMI 7

ECU reports software not compatible or configuration error; generator may not start or synchronize.

ECU Configuration/Programming Fault

SPN 629 FMI 9

Multiple ECU-related faults; general ECU internal error logged; engine may not start or may run in limp mode.

ECU Internal Fault

SPN 84 FMI 1

Engine torque derate; generator cannot reach rated kW; ECU logs torque limitation.

Engine Torque Derate

SPN 91 FMI 1

Fuel level reading erratic or stuck; low fuel alarm active despite full tank.

Fuel Level Sensor Circuit Fault

SPN 94 FMI 1

Engine derates or will not start; fault code indicates low fuel rail pressure during cranking or load.

Low Common Rail Fuel Pressure

SPN 94 FMI 2

Engine runs rough and smokes; ECU logs fuel pressure too high; possible surging under load.

Excessive Common Rail Fuel Pressure

Symptom

Control panel display is blank or intermittent; generator otherwise appears functional.

Control Panel Power or Display Fault

Symptom

Coolant level drops but no external leak is visible; possible white residue in exhaust or milky oil.

Internal Coolant Leak

Symptom

Engine coolant level drops over time; visible coolant under generator or in drip tray.

External Coolant Leak

Symptom

Engine cranks but does not start; no specific fault code; may emit white smoke from exhaust.

No Start – Fuel Delivery Problem

Symptom

Engine emits blue smoke; oil consumption is noticeably high.

Oil Burning in Combustion Chambers

Symptom

Engine emits white smoke, especially on cold start; rough running until warm.

Incomplete Combustion / Low Cylinder Temperature

Symptom

Engine oil level rises or oil appears milky; possible fuel or coolant contamination.

Oil Contamination

Symptom

Engine runs but produces excessive black smoke from exhaust, especially under load.

Rich Combustion / Incomplete Fuel Burn

Symptom

Engine starts then stalls after a few seconds; may repeat several times; no clear code.

Fuel Starvation After Start

Symptom

Generator fails to start automatically on mains failure but can be started manually.

Auto-Start Control Failure

Symptom

Generator frequency is low or high; engine speed appears incorrect; loads may trip.

Incorrect Engine Speed / Frequency

Symptom

Generator starts and runs but does not produce AC voltage at terminals.

No AC Output

Symptom

Generator starts automatically but does not transfer load; ATS remains on mains or in neutral position.

Load Transfer Failure

Symptom

Generator voltage is low or unstable under load; lights flicker; frequency may be normal.

Low or Unstable Generator Voltage

Symptom

Generator will not crank when start command is given; no error code displayed on controller.

Start Circuit Failure

Symptom

High-pitched whine or grinding noise from alternator end of generator.

Alternator Bearing or Mechanical Fault

Symptom

Loud knocking or metallic banging noise from engine under load.

Abnormal Combustion or Mechanical Knock

Symptom

Noticeable vibration of generator set during operation; rattling of frame or mounts.

Excessive Vibration

Symptom

Strong burning smell or visible smoke from wiring or control panel.

Electrical Overheating / Short Circuit

Symptom

Strong fuel smell around generator; visible diesel pooling or wet components.

External Fuel Leak