SPN 84/FMI 19 This fault is typically J1939 wheel-based vehicle speed signal from Source #1, #2, or #3 is erratic. Check as follows: Check for…
SPN 84/FMI 13 This fault is typically the J1939 wheel-based vehicle speed signal from Source #1, #2, or #3 is missing. Check as follows: Check…
SPN 84/FMI 4 This diagnostic condition is typically VSS circuit failed low. Check for a short as follows: Disconnect the VSS connector. Disconnect the CPC…
SPN 84/FMI 3 This diagnostic condition is typically VSS open circuit. Check as follows: Disconnect the Vehicle Speed Sensor (VSS). Measure the resistance between pin…
SPN 91/FMI 3 The typical diagnosis for this fault is circuit failed high. Check as follows: Disconnect the Accelerator Pedal (AP). Turn ON the ignition…
SPN 91/FMI 2 A typical diagnosis for the fault is erratic data. Check as follows: Disconnect the Accelerator Pedal (AP). Turn ON the ignition (key…
SPN 91/FMI 4 The typical diagnosis for this fault is circuit failed low. Check as follows: Disconnect the Accelerator Pedal (AP). Turn ON the ignition…
SPN 97/FMI 4 SPN 97/FMI 4 indicates a Water-in-Fuel circuit short to ground. Check as follows: Check for multiple codes. If any EGR faults are…
SPN 97/FMI 3 SPN 97/FMI 3 indicates a Water-in-Fuel Sensor open circuit. Check as follows: Check for multiple codes. If any EGR faults are active…
SPN 100/FMI 3 A typical diagnosis is an Engine Oil Pressure Sensor circuit failed high. Check as follows: Turn the ignition ON (key On, engine…