Table 91
Diagnostic Trouble Codes for the Engine Pressure Sensors
J1939
Code
Description
Notes
102-3
Engine Intake Manifold #1
Pressure : Voltage Above
Normal
The Electronic Control Module (ECM) detects the following conditions:
The signal voltage from the intake manifold air pressure sensor is greater than 4.92 VDC for at least 0.5
seconds.
The battery voltage is at least 10 VDC.
The ECM will use the default value for the intake manifold air pressure while this code is active. The de-
fault value is 50 kPa (7.25 psi).
The engine will be derated.
102-4
Engine Intake Manifold #1
Pressure : Voltage Below
Normal
The ECM detects the following conditions:
The signal voltage from the intake manifold air pressure sensor is less than 0.2 VDC for at least 0.5
seconds.
The battery voltage is at least 10 VDC.
The ECM will use the default value for the intake manifold air pressure while this code is active. The de-
fault value is 50 kPa (7.25 psi).
The engine will be derated.
108-3
Barometric Pressure :
Voltage Above Normal
The ECM detects that the signal voltage from the barometric pressure sensor is greater than 4.9 VDC for
at least 0.8 seconds. The barometric pressure sensor is contained within the ECM.
The ECM will use the default value for the barometric pressure while this code is active. The default val-
ue is 97 kPa (14 psi).
108-4
Barometric Pressure :
Voltage Below Normal
The ECM detects that the signal voltage from the barometric pressure sensor is less than 0.2 VDC for at
least 0.8 seconds. The barometric pressure sensor is contained within the ECM.
The ECM will use the default value for the barometric pressure while this code is active. The default val-
ue is 97 kPa (14 psi).
157-3
Engine Injector Metering
Rail #1 Pressure : Voltage
Above Normal
The ECM detects that the signal voltage from the fuel rail pressure sensor is greater than 4.9 VDC for at
least 0.2 seconds.
The engine will be derated. The engine may shut down.
157-4
Engine Injector Metering
Rail #1 Pressure : Voltage
Below Normal
The ECM detects that the signal voltage from the intake manifold air pressure sensor is less than 0.34
VDC for at least 0.2 seconds.
The engine will be derated. The engine may shut down.
157-10
Engine Injector Metering
Rail #1 Pressure : Abnor-
mal Rate of Change
The ECM detects the following conditions:
An implausible rate of change in the signal from the fuel rail pressure sensor.
The condition has been detected five times within 3 seconds.
There are no other active diagnostic codes for the fuel rail pressure sensor.
This diagnostic code indicates an intermittent connection in the circuit for the fuel rail pressure sensor.
3251-3
Particulate Trap Differen-
tial Pressure : Voltage
Above Normal
The ECM detects that the signal voltage from the Diesel Particulate Filter (DPF) differential pressure sen-
sor is greater than 4.87 VDC for at least 1.8 seconds.
The ECM will use the default value for the DPF differential pressure while this code is active. The default
value is −0.1 kPa (−0.01 psi).
If equipped, the warning lamp will flash. The engine will be derated.
(continued)
184
UENR0612
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