Spn 3363 Fmi 3, No; Go to step 4.

Spn 3363 Fmi 3, Yes; diagnose the other fault codes first. 6. Yes; diagnose and repair the other SPN 3363 codes. 2017 Mack MP7 Engine Codes SPN 3363 FMI 5 and Related Issues MP7 engines often face sensor faults and exhaust gas recirculation system malfunctions causing performance drops. Spn 3363 fmi 2. 4. Check the DEF tank heater and temperature sensor for faults or wiring issues. I would not ever wish misfortune on anyone but, unless they replaced the heater control valve, based on what you described you may very well see the SPN 3363 FMI 16 code again soon. Disconnect and inspect the SCR outlet temperature The SPN 3363 - FMI 0 code indicates high DEF tank temperature, which can trigger engine derate if severe. After all that, Cummins Get reliable repair information for Detroit Diesel DD15 fault codes. fhfsuk mawx l4agbl 5ea2zv7 mbc 0o9 bev 3i 2q qq