Cummins fault code 2194
Auxiliary Equipment Sensor Input # 2 (OEM Pressure Sensor) Engine Protection: root cause not known
What it means
Cummins' description: Auxiliary Equipment Sensor Input # 2 (OEM Pressure Sensor) Engine Protection – Warning.
SPN 1387 is Auxiliary Equipment Sensor Input # 2 (OEM Pressure Sensor) Engine Protection. FMI 11 means the ECM detected a fault in this system but can't pin down the exact type. Further testing is needed.
These codes cover extra inputs and outputs the ECM controls or monitors: auxiliary temperature and pressure sensors, relays, lamps, and generator or equipment controls on off-highway and generator engines.
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
An auxiliary code for an accessory that isn't used on your truck.
Schedule a repair
An accessory, gauge or lamp not working with the code set. Fix the circuit when convenient.
Stop and get help
The code is tied to a shutdown or protection relay. Have it checked before relying on that protection.
Common causes
The sensor reading itself is out of range or the condition is real, so look at the system:
- Real reading from the equipment the input is monitoring
What you can check before calling
- Find out what the auxiliary input is wired to on your truck or equipment
- Check connectors and relays in that circuit
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
Related Auxiliary inputs, outputs and generator controls codes
- 2195 SPN 703 FMI 14
Auxiliary Equipment Sensor Input # 3 (OEM Switch) Engine Protection: special instructions - 2557 SPN 697 FMI 3
Auxiliary PWM Driver 1 Circuit: circuit voltage high / shorted high - 2558 SPN 697 FMI 4
Auxiliary PWM Driver 1 Circuit: circuit voltage low / shorted low - 1432 SPN 4223 FMI 31
Pre-High Engine Temperature Warning Relay Driver Diagnostic has detected an error: condition exists - 1429 SPN 4187 FMI 31
High Engine Temperature (HET) Shutdown Relay Driver Diagnostic has detected an error: condition exists - 1427 SPN 4185 FMI 31
Overspeed Shutdown Relay Driver Diagnostic has detected an error: condition exists
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 2194 mean?
Cummins fault code 2194 is J1939 SPN 1387 FMI 11: Auxiliary Equipment Sensor Input # 2 (OEM Pressure Sensor) Engine Protection – Warning. In plain terms: auxiliary equipment sensor input # 2 (oem pressure sensor) engine protection: root cause not known.
Can I keep driving with Cummins code 2194?
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 2194?
SPN 1387 identifies the part or system (Auxiliary Equipment Sensor Input # 2 (OEM Pressure Sensor) Engine Protection). FMI 11 describes the type of failure: root cause not known.
What usually causes Cummins code 2194?
The most common causes are: real reading from the equipment the input is monitoring.
Diesel down in the Midlands?
We work on Cummins-powered pickups, vans and medium-duty trucks across Lexington, Columbia and the Midlands, on site at your yard or roadside.