More Volvo Engine Fault Codes

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