SPN 168/FMI 0 This diagnosis is typically battery voltage high. Check as follows: Measure battery voltage with the engine running at maximum rpm. If greater…
SPN 168/FMI 1 This diagnosis is typically battery voltage low. Check as follows: Check the condition of the alternator drive belt and replace, if required.…
SPN 174/FMI 0 SPN 174/FMI 0 indicates the Supply Fuel Temperature Sensor (SFT Sensor) high. Check as follows: Turn the ignition ON (key ON, engine…
SPN 174/FMI 3 SPN 174/FMI 3 indicates a indicates a Supply Fuel Temperature Sensor (SFT Sensor) open circuit. Check as follows: Check for multiple codes.…
SPN 174/FMI 4 SPN 174, PID 174/FMI 4 indicates a SFT Sensor short circuit to ground. Check as follows: Disconnect the SFT Sensor. Disconnect the…
SPN 175/FMI 3 This diagnosis is typically engine oil temperature circuit failed high. Check as follows: Turn the ignition the ON (key ON, engine OFF).…
SPN 175/FMI 14 This diagnosis is typically engine oil temperature out of range (drifted low/high). Note: When diagnosing rationality erratic data faults (FMI 14) always refer…
SPN 175/FMI 14 This diagnosis is typically engine oil temperature out of range (drifted low/high). Note: When diagnosing rationality erratic data faults (FMI 14) always refer…
SPN 190/FMI 2 This is an information code only. SPN 190/FMI 2 is active when the MCM detects an engine speed greater than 2,500 rpm…
SPN 191/FMI 9 This fault is typically the J1939 ETC1 message is missing. Check as follows: Check for multiple codes: If CPC SPN 168/FMI…