Cranking But No Fire — Possible Fault Codes

Found 2 fault codes associated with cranking but no fire. Codes are sorted by severity — check STOP ENGINE codes first.

⚠️ 1 STOP ENGINE-level code associated with this symptom. Do not continue driving.

SPN 1347 FMI 7

Fuel Pump Pressurizing Assembly (HPP)

PACCAR MX-13 • Component: High Pressure Fuel Pump (HPP) • J1939

🔴 STOP ENGINE

SPN 647 FMI 4

Engine Speed Sensor

PACCAR MX-13 • Component: Crankshaft Position Sensor (CKP) • J1939

🟡 CHECK AT NEXT STOP

⚠️ 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 cranking but no fire based on SAE J1939/J1587 fault code definitions and OEM service documentation.