- SPN 27EGR valve position
- SPN 29Accelerator pedal, second sensor
- SPN 37Transmission air supply pressure
- SPN 46Pneumatic supply pressure
- SPN 51Throttle valve position
- SPN 84Vehicle speed
- SPN 91Accelerator pedal
- SPN 94Low-pressure fuel circuit (lift pump) pressure
- SPN 97Water in fuel
- SPN 98Engine oil level
- SPN 100Engine oil pressure
- SPN 102Boost pressure
- SPN 105Intake manifold air temperature
- SPN 107Air filter restriction
- SPN 108Barometric pressure
- SPN 110Engine coolant temperature
- SPN 111Coolant level
- SPN 116Brake application pressure (brake pedal)
- SPN 117Air pressure, brake circuit 1
- SPN 118Air pressure, brake circuit 2
- SPN 157Fuel rail pressure
- SPN 158Ignition switch voltage
- SPN 167Charging voltage (alternator)
- SPN 168Battery and control unit supply voltage
- SPN 171Outside air temperature
- SPN 174Fuel temperature
- SPN 175Engine oil temperature
- SPN 190Engine speed
- SPN 412EGR gas temperature
- SPN 558Accelerator pedal idle switch
- SPN 597Brake pedal switch
- SPN 598Clutch pedal switch
- SPN 627Engine control unit power supply
- SPN 629Engine control unit (ECU)
- SPN 630Engine control unit calibration memory
- SPN 633Fuel metering valve (high-pressure pump regulator)
- SPN 636Camshaft sensor
- SPN 637Crankshaft sensor
- SPN 639CAN bus (J1939)
- SPN 641Variable geometry turbo (VGT) actuator
- SPN 647Radiator fan clutch (control circuit)
- SPN 651The cylinder 1 injector
- SPN 652The cylinder 2 injector
- SPN 653The cylinder 3 injector
- SPN 654The cylinder 4 injector
- SPN 655The cylinder 5 injector
- SPN 656The cylinder 6 injector
- SPN 677Starter relay
- SPN 723Second engine speed sensor (usually the camshaft)
- SPN 729Intake air heater (relay and circuit)
- SPN 1079Sensor 5-volt supply, circuit 1
- SPN 1080Sensor 5-volt supply, circuit 2
- SPN 1086Parking brake and trailer circuit air pressure
- SPN 1087Service brake circuit 1 air pressure
- SPN 1088Service brake circuit 2 air pressure
- SPN 1089Auxiliary equipment supply pressure
- SPN 1090Air suspension supply pressure
- SPN 1127Turbo boost pressure
- SPN 1209Exhaust back pressure
- SPN 1231CAN bus 2 (J1939)
- SPN 1239High-pressure fuel leak
- SPN 1322Misfire in multiple cylinders
- SPN 1323Misfire in cylinder 1
- SPN 1324Misfire in cylinder 2
- SPN 1325Misfire in cylinder 3
- SPN 1326Misfires in cylinder 4
- SPN 1327Misfire in cylinder 5
- SPN 1328Misfire in cylinder 6
- SPN 1347High-pressure pump (supply regulator)
- SPN 1351Air compressor control (governor solenoid valve)
- SPN 1485Engine control unit main relay
- SPN 1569Engine protection power derate
- SPN 1761AdBlue tank level
- SPN 2623Accelerator pedal, sensor channel 2
- SPN 2659EGR gas flow
- SPN 2791EGR valve (control)
- SPN 2797Injectors, group 1
- SPN 2798Injectors, group 2
- SPN 3031AdBlue tank temperature
- SPN 3216SCR inlet NOx sensor
- SPN 3226SCR outlet NOx sensor
- SPN 3242Particulate filter inlet temperature
- SPN 3246Particulate filter outlet temperature
- SPN 3251Particulate filter differential pressure
- SPN 3361AdBlue doser (injector)
- SPN 3363AdBlue tank heating (coolant valve)
- SPN 3364AdBlue quality
- SPN 3509Sensor 5-volt supply, circuit 1
- SPN 3510Sensor 5-volt supply, circuit 2
- SPN 3511Sensor 5-volt supply, circuit 3
- SPN 3512Sensor 5-volt supply, circuit 4
- SPN 3513Sensor 5-volt supply, circuit 5
- SPN 3514Sensor 5-volt supply, circuit 6
- SPN 3516AdBlue concentration (quality sensor)
- SPN 3719Particulate filter soot load
- SPN 3936Particulate filter system
- SPN 4094NOx emissions above the limit due to poor AdBlue
- SPN 4334AdBlue pressure (doser pump)
- SPN 4354AdBlue line heater, line 1
- SPN 4355AdBlue line heater, line 2
- SPN 4356AdBlue line heater, line 3
- SPN 4360SCR inlet temperature (AdBlue catalyst)
- SPN 4363SCR outlet temperature
- SPN 4364SCR efficiency (NOx reduction)
- SPN 4374AdBlue pump overworking: clogged or leaking lines
- SPN 5246Power derate caused by the AdBlue (SCR) system
- SPN 5585Rail fuel pressure during cranking
Who keeps this reference
The reference is kept by Oleg Dmitriev, an auto electrician from Almaty with 26 years of experience: computer diagnostics of cars and trucks, repair of control units (ECUs). Can’t find the cause? Message him.