What do Cummins 3712 and 3714 mean?
Cummins 3714 indicates an inducement or power-limiting state in the cited OEM bulletin; 3712 indicates severe inducement. These describe the engine response to an unresolved or unverified fault, not the failed part. The engine, full fault list and installed calibration determine the next diagnostic step.
Application & limits
Cummins TSB120309, revisions released 4 February 2019 and 17 March 2020, lists all electronically controlled engines. These are historical Cummins references, not a promise that every engine uses the same lamps, speed limit or timing. Match ESN, service model and installed calibration before using current diagnostics.
What the symptom or code tells you
3714: the cited Cummins bulletin identifies this as inducement. In plain language, the engine is reporting an imposed operating limitation associated with another fault or its verification. It is a result/status to investigate, not the name of a damaged component.
3712: the same bulletin identifies this as severe inducement. It represents a more advanced inducement state in that documented sequence. It does not establish which DEF/SCR component needs repair or how long a particular truck can continue.
Why the related faults matter
A 3714/3712 pair can sit downstream of an active SCR-related fault. Save the original fault list and order of events; a dashboard photo showing only the inducement code can hide the diagnostic starting point.
The OEM bulletin also documents software/parameter and fault-verification cases. It names 285 and 4572 in a particular analog-versus-multiplexed DEF sensor configuration, and 6255/6254 as related inducement codes. Their presence does not identify that configuration on your engine. Current application checks come before a repair decision.
Operator observations versus mechanic work
- Operator: preserve what is already visible
- Record the complete display, other codes/FMI, original warning sequence, any recent DEF or repair work, and current location. Follow the actual operator manual and stop warnings; do not run a road test or reset to gather evidence.
- Mechanic: establish the fault and verify the repair
- Identify the ESN/service model and calibration, retrieve associated active/inactive faults, follow the current root-fault procedure and verify the engine accepts the completed repair. Software/configuration assessment is selected for the actual application.
- If only 3714/3712 remain after work
- Provide the previous scan and work order. The historical software/verification scenario is one reason to investigate remaining inducement rather than replacing another component or repeating a code clear.
Information to send
Use details already available from the normal operator position or your records. Do not run a test or approach a hazard to collect them.
- ESN, truck year/VIN and the full display message.
- Every active and inactive code already available, with FMI where shown.
- Which fault appeared first and any recent SCR repair or software work.
- Current symptoms and exact service location.
What the mechanic assesses
The mechanic separates the inducement status from the fault that triggered it and checks whether recent work has been properly verified by the engine. A code-clear command is not evidence that the root concern was repaired. Current diagnostics and calibration checks are chosen for the identified engine; we do not publish a universal reset or driving window.
Prepare a repair request
Text the machine or vehicle, exact symptom and location. We confirm scope, safe access, parts needs, pricing and availability before a visit.
Serving Langley, Port Kells and the Lower Mainland service area. Readers elsewhere can use the source references and contact a qualified local service provider.
Related service & guides
Sources & applicability
Editorial update: . Public manufacturer and authority references checked on this date. Current vehicle-specific procedures and superseding information must be matched to the actual application before diagnosis or repair.
- Cummins TSB120309, February 2019 revision
Released 4 February 2019. Product affected: all electronically controlled engines in the Cummins bulletin. Identifies 3714/6255 as inducement and 3712/6254 as severe inducement in its documented scenario. Historical, not a universal current countdown or reset procedure.
- Cummins TSB120309, March 2020 revision
Released 17 March 2020. Later historical revision read after the Director supplied the 2019 starting reference. All electronically controlled engines; current ESN-specific applicability and software still require verification.
- Cummins QuickServe fault-code analyzer
Undated Cummins public reference. ESN-based identification; not a diagnostic procedure for every engine.