PACCAR PX-6 CM2150 (2007-09) Fault Code: 1921 PID: SID 324 SPN: 3251 FMI: 0 Aftertreatment Diesel Particulate Filter Differential Pressure – Data Valid But Above Normal Operating Range – Moderately Severe Level.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable...
