Cummins fault code 1431
Pre-Low Oil Pressure Warning Relay Driver Diagnostic has detected an error: condition exists
What it means
Cummins' description: Pre-Low Oil Pressure Warning Relay Driver Diagnostic has detected an error - Condition Exists.
SPN 4188 is Pre-Low Oil Pressure Indicator Relay Driver. FMI 31 means the ECM has confirmed the condition described in the code is happening.
The ECM monitors oil pressure, oil temperature and, on some engines, oil level. Low oil pressure is one of the fastest ways to destroy an engine, so Cummins treats it very seriously.
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 oil change reminder, or a sensor code where the gauge reads normal and the level is full.
Schedule a repair
Oil level low or a sensor code that keeps coming back. Top off and get it checked soon, and don't ignore oil consumption.
Stop and get help
Low oil pressure warning, gauge near zero, knocking, or a stop lamp. Shut the engine off immediately. Every second of low oil pressure damages bearings.
Common causes
The sensor reading itself is out of range or the condition is real, so look at the system:
- Low oil level
- Wrong oil viscosity or diluted oil (fuel or coolant in the oil)
- Worn oil pump or bearings
- Clogged oil filter or pickup
- Real high oil temperature from heavy load or a cooling problem
What you can check before calling
- Check the oil level with the engine off and level
- Look at the oil for milky color (coolant) or a fuel smell
- Note whether the oil gauge drops at hot idle
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, 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.
Related Engine oil codes
- 1428 SPN 4186 FMI 31
Low Oil Pressure (LOP) Shutdown Relay Driver Diagnostic has detected an error: condition exists - 2154 SPN 611 FMI 3
Post-Filter Oil Pressure Sensor Circuit- Shorted high: circuit voltage high / shorted high - 2155 SPN 611 FMI 4
Post-Filter Oil Pressure Sensor Circuit- Shorted Low: circuit voltage low / shorted low - 688 SPN 98 FMI 0
Engine Oil Level: reading above normal (most severe) - 649 SPN 1378 FMI 31
Engine Oil Change Interval: condition exists - 612 SPN 99 FMI 1
High Lubricating Oil Filter Restriction: reading below normal (most severe)
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 1431 mean?
Cummins fault code 1431 is J1939 SPN 4188 FMI 31: Pre-Low Oil Pressure Warning Relay Driver Diagnostic has detected an error - Condition Exists. In plain terms: pre-low oil pressure warning relay driver diagnostic has detected an error: condition exists.
Can I keep driving with Cummins code 1431?
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 1431?
SPN 4188 identifies the part or system (Pre-Low Oil Pressure Indicator Relay Driver). FMI 31 describes the type of failure: condition exists.
What usually causes Cummins code 1431?
The most common causes are: low oil level; wrong oil viscosity or diluted oil (fuel or coolant in the oil); worn oil pump or bearings.
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.