NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
SPN 4094 — NOx conversion inducement - severe derate active
SPN 4094 is the parameter the ECM is flagging on CAT, Detroit, International, PACCAR, MERCEDES, Volvo, Mack, Cummins engines. The FMI that comes with it tells you how it failed. Each failure mode below has its own causes and its own test order — do not treat them as the same repair.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
NOx conversion inducement - severe derate active
A general 'this state is true' flag. It is not a circuit failure — the ECM is reporting that a defined condition is active, such as a regen inhibited or a switch in a given position.
The reference is free. The diagnosis is Pro.
Every SPN and FMI page on this site stays open — no account needed. Pro members can take the code into Truck Commander Pro AI with the VIN, symptoms and photos, keep per-truck history, and print a work order. $14.99 a month or $99.99 a year.