Coolant Temperature (Code 6.1, PID/SPN 110)
Cause
Reaction
Remedy
• Coolant temperature is too
high
• Engine control module
reduces engine power
(unless the protection has
been shut off with the VODIA
diagnostic tool)
• Check the coolant level
• Check the charge air cooler
(cleanliness)
• Check if there is air in the
cooling system
• Check the pressure cap on
the expansion tank
• Check coolant temperature
sensor function
• Check thermostat function
Boost Temperature (Code 6.2, PID/SPN 105)
Cause
Reaction
Remedy
• Boost temperature is too high
• Engine control module
reduces engine power
(unless the protection has
been shut off with the VODIA
diagnostic tool)
• Check the coolant level
• Check the charge air cooler
(cleanliness)
• Check boost temperature
sensor function
• Check the function of the thermostat
Data Link (CAN), CIU (Code 6.4, SID 231/SPN 639)
Cause
Reaction
Remedy
• Faulty data link (CAN), , CIU
• Instruments and warning
lamps stop working
• Check that the 8-pin connector
is not damaged
• Check that the cables
between the CIU and the
engine management unit are
not damaged
Data Link (CAN), EMS 2 (Code 6.5, SID 231/SPN 639/2017/PSID 201)
Cause
Reaction
Remedy
Internal fault in control module
• Engine not operating: engine
can not be started. Engine
operating: engine idles and
can only be stopped with the
auxiliary stop (AUX-stop)
• Check that the 8-pin connector
is not damaged
• Check that the cables
between the CIU and the
engine management unit are
not damaged
• Check that sleeves 11 and 12
in the connector on the CIU
are not damaged
Oil Pressure (Code 6.6, PID/SPN 100)
Cause
Reaction
Remedy
• Oil pressure is too low
• Engine control module
reduces engine power
(unless the protection has
been shut off with the VODIA
diagnostic tool)
• Check oil level
• Check that the air filter is not
blocked
• Check system pressure
valves and safety valves in
the oil system
• Check oil pressure sensor
function
Piston Cooling Pressure (Code 6.7, PPID 8/SPN 520192)
Cause
Reaction
Remedy
• Piston cooling pressure is too
low
• Engine stopped
• Check that the oil pressure in
the engine exceeds175 kPa
(25.4 psi)
Piston Cooling Pressure Sensor (Code 6.8, PPID 8/SPN 520192)
Cause
Reaction
Remedy
• Shorted to plus (+) or minus
(-)
• Break
• None
• Check that the piston cooling
pressure sensor contact is
correctly installed
• Check that the cable harness
to the piston cooling pressure
sensor has not been damaged
• Check the piston cooling
pressure sensor functionality
Battery Voltage, CIU (Code 6.9, PID/SPN 158)
Cause
Reaction
Remedy
• Short circuit to negative (-)
• Faulty alternator
• Faulty battery, battery cables
• Problems in engine starting
• Check the supply voltage
from the control unit
• Check the batteries
• Check the alternator
• Check the 8-pin contact
Injector, Cylinder #1 (Code 7.1, SID 1/SPN 651)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
• Check that the injector cables
are not damaged
• Check that the injector connections
are not damaged
• Check fuel supply pressure
• Check the valve clearance
• Do a compression test and
check cylinder #1
Injector, Cylinder #2 (Code 7.2, SID 2/SPN 652)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
• Check that the injector cables
are not damaged
• Check that the injector connections
are not damaged
• Check fuel supply pressure
• Check the valve clearance
• Do a compression test and
check cylinder #2
Injector, Cylinder #3 (Code 7.3, SID 3/SPN 653)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
• Check that the injector cables
are not damaged
• Check that the injector connections
are not damaged
• Check fuel supply pressure
• Check the valve clearance
• Do a compression test and
check cylinder #3
Injector, Cylinder #4 (Code 7.4, SID 4/SPN 654)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
• Check that the injector cables
are not damaged
• Check that the injector connections
are not damaged
• Check fuel supply pressure
• Check the valve clearance
• Do a compression test and
check cylinder #4
Injector, Cylinder #5 (Code 7.5, SID 5/SPN 655)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
?Check that the injector cables
are not damaged
?Check that the injector connections
are not damaged
?Check fuel supply pressure
?Check the valve clearance
?Do a compression test and
check cylinder #5
Injector, Cylinder #6 (Code 7.6, SID 6/SPN 656)
Cause
Reaction
Remedy
• Electrical fault
• Faulty compression or injector
• Engine runs on 5 cylinders
• Abnormal sound
• Reduced performance
• Check that the injector cables
are not damaged
• Check that the injector connections
are not damaged
• Check fuel supply pressure
• Check the valve clearance
• Do a compression test and
check cylinder #6
Crankcase Ventilation Pressure (Code 7.7, PID/SPN 153)
Cause
Reaction
Remedy
• Crankcase ventilation pressure
too high
• The engine is shut down (if
the protection has notbeen
shut off by the parameter tool)
• Check whether the crankcase
ventilation is blocked
• Check whether cylinder liners,
pistons or piston rings are
worn or damaged
Crankcase Ventilation Pressure Sensor (Code 7.8, PID/SPN 153)
Cause
Reaction
Remedy
• Shorted to plus (+) or minus
(-)
• Break
• None
• Check that the crankcase
ventilation pressure sensor
contact is correctly installed
• Check that the cable harness
to the crankcase ventilation
pressure sensor has not been
damaged
• Check that the crankcase
ventilation pressure sensor
correctly installed
• Check crankcase ventilation
pressure sensor function
Air Temperature Sensor, Inlet (Code 7.9, PID/SPN 172)
Cause
Reaction
Remedy
• Shorted to plus (+) or minus
(-)
• Break
• None
• Check that the air temperature
sensor contact is correctly
installed
• Check that the cable harness
to the air temperature sensor
has not been damaged
• Check that the air temperature
sensor is correctly installed
• Check the air temperature
sensor functionality
Injection Pressure (Code 8.3, PID/SPN 164)
Cause
Reaction
Remedy
• Fault in fuel supply
• Fault in fuel pump
• Fault in harness
• Fault in sensor
• Warning lamp lights up
• Control unit reduces engine
power
• Check harness
• Check sensor
• Check fuel filter
• Check fuel pump
Injection Pressure, Regulator (Code 8.3, SID 42/SPN 679)
Cause
Reaction
Remedy
• Faulty cables
• Faulty actuator
• Fault in MPROP
• Control unit reduces engine
power
• Contact an authorized Volvo
Penta workshop
Pressure in Distribution Manifold (Code 8.3, PSID 96/SPN 1239)
Cause
Reaction
Remedy
• Leakage in the high pressure
fuel system
• Leakage in the high pressure
supply pipe to the injector
• Control unit reduces engine
power
• Contact an authorized Volvo
Penta workshop
Pressure Valve (Code 8.3, PSID 97/SPN 679)
Cause
Reaction
Remedy
• Leakage in the PRV (Pressure
Release Valve)
• The PRV stuck closed
• The PRV stuck open
• Control unit reduces engine
power
• Contact an authorized Volvo
Penta workshop
ECU Temperature (Code 8.4, PPID 55/SPN 1136)
Cause
Reaction
Remedy
• Control unit too hot, incorrect
assembly
• Electrical fault, damaged sensor
• None
• Check the control unit installation.
Recommended ambient
temperature is 50°C
(122°F)
Internal EGR (Code 8.5, PPID 19/SPN 2791)
Cause
Reaction
Remedy
• Fault in cable harness (boost
pressure sensor)
• Mechanical fault on the IEGR
• Engine control module
reduces engine power
• Check cable harness (boost
pressure sensor)
• Check the IEGR
• Contact a Volvo Penta
authorized workshop
Preheating Sensor (Code 8.6, SID 70/SPN 729)
Cause
Reaction
Remedy
• Fault in cable harness
• Fault in preheating relay
• Preheating can not be activated
• Check the cable harness
• Check the preheating relay