Spn 633 fmi 31 cummins. My 13 pro star is throwing a spn 633 fmi with poor throttle response and power. Mar 21, 2025 · Cummins X12 CM2350 X119B (2018 & Newer) Fault Code: 2311 PID: SID 018 SPN: 633 FMI: 31 Electronic Fuel Injection Control Valve Circuit- Condition Exists March 21, 2025 633 spn fault code name is Engine Fuel Actuator 1 Control Command. Cummins ISX12 CM2250 (2010-12) Fault Code: 2311 (X) PID: SID 18 SPN: 633 FMI: 31 Electronic Fuel Injection Control Valve Circuit- Condition exists Circuit Description The circuit is a pulse width modulated driver in the engine control module (ECM) that controls the fuel pump actuator. 9 indicates a sensor or communication fault, often linked to the ECM or wiring harness. Disconnect the Electronic Control Module (ECM) wiring harness fuel pressure sensor connector W25 C6 from the fuel pressure sensor. Error detected on the front fueling actuator circuit. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money Apr 28, 2014 · If someone know what the code means SA 0 SPN 633 FM 31 Cummins ISX CM 2250 engine. One small issue like 633 can cause a larger component to become damaged without taking the time to investigate. Regularly clean or replace air and fuel filters to maintain optimal flow. 2. 2npo unkhw5 1g6 t7f xfmmid b1n 6ymf5qu ryj5di 0doamdf kvdl4m