Derate Pending Soon — Possible Fault Codes
Found 1 fault code associated with derate pending soon. Codes are sorted by severity — check STOP ENGINE codes first.
SPN 3031 FMI 9
DEF Quality Sensor
Volvo D13 • Component: DEF Concentration Sensor • J1939
⚠️ Diagnostic Note:
Symptoms can have multiple root causes. Always verify with a diagnostic scan tool before replacing parts. The fault codes listed above are possible matches for derate pending soon based on SAE J1939/J1587 fault code definitions and OEM service documentation.