Manual

RT115 Tier 3 - SERVICE 215
AS NEEDED
RT115 Tier 3 - SERVICE 215
AS NEEDED
Engine Diagnostic Codes
To read a step-by-step troubleshooting sequence for each code,
see repair guide.
Two-line diagnostic
code
Definition Possible
cause
SPN 28, FMI 3 attachment throttle
input high
check sensor
(E2) and
wiring
SPN 28, FMI 4 attachment throttle
input low
SPN 29, FMI 3 primary throttle input
high
SPN 29, FMI 4 primary throttle input
low
SPN 100, FMI 1 engine oil pressure
extremely low
oil pressure
sensor (R1)
SPN 100, FMI 3 engine oil pressure
input voltage high
oil pressure
sensor (R1)
SPN 100, FMI 4 engine oil pressure
input voltage low
oil pressure
sensor (R1)
SPN 100, FMI 18 engine oil pressure
moderately low
oil pressure
sensor (R1)
SPN 105, FMI 3 manifold air temp
input voltage high
manifold air
temp sensor
(R2)
SPN 105, FMI 4 manifold air temp
input voltage low
manifold air
temp sensor
(R2)
SPN 105, FMI 16 manifold air temp
moderately high
manifold air
temp sensor
(R2)
Engine Diagnostic Codes
To read a step-by-step troubleshooting sequence for each code,
see repair guide.
Two-line diagnostic
code
Definition Possible
cause
SPN 28, FMI 3 attachment throttle
input high
check sensor
(E2) and
wiring
SPN 28, FMI 4 attachment throttle
input low
SPN 29, FMI 3 primary throttle input
high
SPN 29, FMI 4 primary throttle input
low
SPN 100, FMI 1 engine oil pressure
extremely low
oil pressure
sensor (R1)
SPN 100, FMI 3 engine oil pressure
input voltage high
oil pressure
sensor (R1)
SPN 100, FMI 4 engine oil pressure
input voltage low
oil pressure
sensor (R1)
SPN 100, FMI 18 engine oil pressure
moderately low
oil pressure
sensor (R1)
SPN 105, FMI 3 manifold air temp
input voltage high
manifold air
temp sensor
(R2)
SPN 105, FMI 4 manifold air temp
input voltage low
manifold air
temp sensor
(R2)
SPN 105, FMI 16 manifold air temp
moderately high
manifold air
temp sensor
(R2)