Piston Cooling Pressure Sensor (Code 6.8, PPID 8/SPN 520192)
Cause
•
Shorted to plus (+) or minus
(-)
•
Break
Internal EGR (Code 8.5, PPID 19/SPN 2791)
Cause
•
Fault in cable harness (boost
pressure sensor)
•
Mechanical fault on the IEGR
ECU Temperature (Code 8.4, PPID 55/SPN 1136)
Cause
•
Control unit too hot, incorrect
assembly
•
Electrical fault, damaged sen-
sor
Speed Potentiometer Connected to CIU (Code 2.8, PPID 132/SPN 91, 608)
Cause
•
Shorted to plus (+) or minus
(-)
•
Fault in sensor
Injector, Cylinder #1 (Code 7.1, SID 1/SPN 651)
Cause
•
Electrical fault
•
Faulty compression or injec-
tor
7748681 12-2011
Reaction
•
None
TAD1650GE, TAD1651GE
Reaction
•
Engine control module
reduces engine power
TAD1650GE, TAD1651GE, TWD1643GE
Reaction
•
None
Reaction
•
Engine goes to idle
•
Speed feezes
Reaction
•
Engine runs on 5 cylinders
•
Abnormal sound
•
Reduced performance
171/298
Fault Code Register
Remedy
•
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 dam-
aged
•
Check the piston cooling
pressure sensor functionality
Remedy
•
Check cable harness (boost
pressure sensor)
•
Check the IEGR
•
Contact a Volvo Penta
authorized workshop
Remedy
•
Check the control unit instal-
lation. Recommended ambi-
ent temperature is 50°C
(122°F)
Remedy
•
Check that the potentiometer
has been connected correctly
•
Check that the cable harness
to the potentiometer has not
been damaged
•
Check the potentiometer
function
Remedy
•
Check that the injector cables
are not damaged
•
Check that the injector con-
nections are not damaged
•
Check fuel supply pressure
•
Check the valve clearance
•
Do a compression test and
check cylinder #1
43