Cummins fault code 2349
EGR Valve Control Circuit: circuit open / current low
What it means
Cummins' description: EGR Valve Control Circuit - Current below normal or open circuit.
SPN 2791 is Engine Exhaust Gas Recirculation 1 (EGR1) Valve Control. FMI 5 means the ECM is driving the circuit but almost no current flows, which usually means an open circuit: a broken wire, unplugged connector, or failed coil.
The EGR system routes a measured amount of cooled exhaust back into the intake to lower combustion temperature and NOx. It uses a valve, a cooler, temperature sensors and a differential pressure sensor to measure flow.
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 EGR code that clears, with no power loss, smoke or coolant loss.
Schedule a repair
Amber lamp, rough running, more soot, or slow regens. EGR problems load the DPF and get worse with time, so schedule it.
Stop and get help
Coolant disappearing with white smoke, or a stop lamp. Shut it down. A leaking EGR cooler can push coolant into the engine and cause hydrolock or head gasket damage.
Common causes
FMI 5 is an electrical or signal fault, so start with the circuit:
- EGR valve position sensor or actuator wiring fault
- Failed EGR temperature or differential pressure sensor
- Cracked sensor hose on the differential pressure sensor
If the circuit checks out, the reading may be real. Other possibilities: eGR valve sticking from soot buildup; clogged EGR cooler restricting flow; leaking EGR cooler (watch for coolant loss or white smoke).
What you can check before calling
- Check coolant level. Unexplained loss can point to an EGR cooler leak
- Look for white smoke or a sweet coolant smell from the exhaust
- Look for soot tracks or loose hoses around the EGR valve and pressure sensor
Clearing the code without fixing the cause usually brings it right back, and on emissions systems it can restart derate timers.
Engines and sources
Listed by Cummins for: QSB 6.7, QSL 9, QSX 15, QSB 4.5, QSF 3.8. 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: Cummins Tier 4 Fault Codes. Always confirm with Cummins service information (QuickServe) for your engine serial number.
Same SPN, other failure types
- 1893 SPN 2791 FMI 9
EGR Valve Control Circuit: abnormal update rate - 1896 SPN 2791 FMI 13
EGR Valve Controller: out of calibration - 1961 SPN 2791 FMI 15
EGR Valve Control Circuit Over Temperature: reading above normal (least severe) - 2353 SPN 2791 FMI 6
EGR Valve Control Circuit: circuit grounded / current high - 2357 SPN 2791 FMI 7
EGR Valve Control Circuit: not responding / out of adjustment - 6555 SPN 2791 FMI 7
EGR Valve Control Circuit: not responding / out of adjustment
Related EGR codes
- 2375 SPN 412 FMI 3
EGR Temperature Sensor Circuit: circuit voltage high / shorted high - 2376 SPN 412 FMI 4
EGR Temperature Sensor Circuit: circuit voltage low / shorted low - 2274 SPN 411 FMI 4
EGR Differential Pressure Sensor Circuit: circuit voltage low / shorted low - 2273 SPN 411 FMI 3
EGR Differential Pressure Sensor Circuit: circuit voltage high / shorted high - 2272 SPN 27 FMI 4
EGR Valve Position Circuit: circuit voltage low / shorted low - 1867 SPN 412 FMI 2
EGR Temperature: 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 2349 mean?
Cummins fault code 2349 is J1939 SPN 2791 FMI 5: EGR Valve Control Circuit - Current below normal or open circuit. In plain terms: egr valve control circuit: circuit open / current low.
Can I keep driving with Cummins code 2349?
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 2349?
SPN 2791 identifies the part or system (Engine Exhaust Gas Recirculation 1 (EGR1) Valve Control). FMI 5 describes the type of failure: circuit open / current low.
What usually causes Cummins code 2349?
The most common causes are: eGR valve position sensor or actuator wiring fault; failed EGR temperature or differential pressure sensor; cracked sensor hose on the differential pressure sensor.
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