This diagnostic condition is typically Intake Air Temperature Sensor open circuit or short to power. 87.1.1 Intake Air Temperature Sensor Open Circuit/Short to Power Check…

86.1 SPN 1624/FMI 9 This fault is typically the J1939 TCO1 message is missing. 86.1.1 Missing TCO1 Message Check Check as follows: 1. Check for…

84.1 SPN 1172/FMI 2 This code is typically a coolant temperature/compressor inlet temperature plausibility error. 84.1.1 Turbo Compressor Inlet Temperature Sensor Check Check as follows:…

83.1 SPN 1073/FMI 4 This fault code indicates that the Jake Brake Stage 2 circuit failed low. 83.1.1 Short to Ground Check Check as follows:…

82.1 SPN 1072/FMI 4 This fault code indicates that the Jake Brake Stage 1 circuit failed low. 82.1.1 Short to Ground Check Check as follows:…

81.1 SPN 1071/FMI 3 This fault code indicates that there is a short to power. 81.1.1 Short to Power Check Check as follows: 1. Turn…

80.1 SPN 986/FMI 9 This fault is typically the J1939 CM1 message is missing. 80.1.1 Missing J1939 CM1 Message Check Check as follows: 1. Check…

79.1 SPN 973/FMI 9 This fault is typically the J1939 EBC1 message from the transmission is missing. 79.1.1 Missing EBC1 Transmission from ABS Check Check…

78.1 SPN 904/FMI 9 This fault is typically the J1939 EBC2 message from the ABS is missing. 78.1.1 Missing EBC2 Message from ABS Check Check…

A typical diagnosis is swapped pins. If this SPN and FM:I are active, verify that the wiring from CMP Sensor pin 1 to pin 44…