Turbo Lag — Possible Fault Codes

Found 2 fault codes associated with turbo lag. Codes are sorted by severity — check STOP ENGINE codes first.

MID 128 PSID 90 FMI 4

EGR Differential Pressure Sensor

Volvo D13 • Component: EGR Differential Pressure Sensor / EGR Valve • J1587

🟠 CHECK SOON

SPN 411 FMI 16

Exhaust Gas Recirculation (EGR) Differential Pressure

PACCAR MX-13 • Component: EGR Differential Pressure Sensor / EGR System • J1939

🟠 CHECK SOON

⚠️ 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 turbo lag based on SAE J1939/J1587 fault code definitions and OEM service documentation.