Cummins fault code 283
Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit: circuit voltage high / shorted high
What it means
Cummins' description: Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit - shorted high.
SPN 1043 is Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit. FMI 3 means the voltage on the circuit is higher than possible for a good sensor, usually an open signal wire, a short to a power wire, or a failed sensor.
The crank and cam position sensors tell the ECM exactly where each piston is so it can time fuel injection. Losing one causes rough running; losing both usually stops the engine.
What the lamp means
An amber (yellow) warning lamp means the engine can usually keep running, but the fault should be repaired soon, ideally the same day.
Green, yellow, red: three ways this can look
The same code can be a quick fix or a reason to shut down. Match your situation to the closest example.
Keep an eye on it
One sensor code that set briefly and cleared, with the engine starting and running normally.
Schedule a repair
Long cranking, occasional stalling, or the code returns. Replace the sensor soon. These usually fail completely without much warning.
Stop and get help
Engine stalls or won't start, or a stop lamp with lost speed signals. Don't plan on driving it until it's fixed.
Common causes
FMI 3 is an electrical or signal fault, so start with the circuit:
- Speed or position sensor failed
- Damaged harness near the flywheel housing or front cover
- Sensor gap wrong or sensor loose
- Damaged tone wheel
If the circuit checks out, the reading may be real. Other possibilities: real engine overspeed from downhill or a missed shift; signal noise from aftermarket electrical add-ons.
What you can check before calling
- Note any stalling, hard starting, or rough running
- Look at the sensor connectors for oil or damage
- Think about whether any electrical work was done recently
Clearing the code without fixing the cause usually brings it right back, and on emissions systems it can restart derate timers.
Engines and sources
Cummins uses the same fault code numbers across its electronic engines, including on-highway models like the ISB/B6.7, ISL/L9 and ISX/X15, though not every code applies to every engine or software level. Source: Diagnostic Fault Codes for Cummins Engines. Always confirm with Cummins service information (QuickServe) for your engine serial number.
Same SPN, other failure types
- 284 SPN 1043 FMI 4
Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit: circuit voltage low / shorted low - 387 SPN 1043 FMI 3
Accelerator Pedal Position Sensor Supply Voltage Circuit: circuit voltage high / shorted high - 443 SPN 1043 FMI 4
Accelerator Pedal Position Sensor Supply Voltage Circuit: circuit voltage low / shorted low - 496 SPN 1043 FMI 11
Engine Speed/Position Sensor #2 (Camshaft) Supply Voltage: root cause not known
Related Engine speed and position sensors codes
- 234 SPN 190 FMI 0
Engine Crankshaft Speed/Position: reading above normal (most severe) - 121 SPN 190 FMI 10
Engine Speed/Position Sensor Circuit: abnormal rate of change - 115 SPN 612 FMI 2
Engine Magnetic Speed/Position Lost Both of Two Signals: erratic or intermittent signal - 497 SPN 1377 FMI 2
Multiple Unit Synchronization Switch: erratic or intermittent signal - 523 SPN 611 FMI 2
Auxiliary Intermediate (PTO) Speed Switch Validation: erratic or intermittent signal - 689 SPN 190 FMI 2
Engine Crankshaft Speed/Position: erratic or intermittent signal
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does Cummins fault code 283 mean?
Cummins fault code 283 is J1939 SPN 1043 FMI 3: Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit - shorted high. In plain terms: engine speed/position sensor #1 (crankshaft) supply voltage circuit: circuit voltage high / shorted high.
Can I keep driving with Cummins code 283?
Usually for a short time, if the engine runs normally and no other warnings are on. Get it diagnosed soon, because many amber codes lead to a derate if ignored. Look at the green, yellow and red examples on this page to judge your situation.
What is the SPN and FMI for Cummins code 283?
SPN 1043 identifies the part or system (Engine Speed/Position Sensor #1 (Crankshaft) Supply Voltage Circuit). FMI 3 describes the type of failure: circuit voltage high / shorted high.
What usually causes Cummins code 283?
The most common causes are: speed or position sensor failed; damaged harness near the flywheel housing or front cover; sensor gap wrong or sensor loose.
Diesel down in the Midlands?
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