PACCAR PX-8 CM2150 (2007-09) Fault Code: 2778 PID: 289 SPN: 3481 FMI: 0 Aftertreatment Fuel Rate – Data Valid but Above Normal Operational Range – Moderately Severe Level. The lubricating engine oil needs to be changed due to possible fuel dilution.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
If this fault code can be triggered when fuel dilution of the lubricating oil is possible. Change the engine lubricating oil and clear the fault code using INSITE™ electronic service tool to reset the Maintenance Monitor feature.
Possible repairs:
1)Change the engine lubricating oil.
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SERVICE MANUAL 3000 AND 4000 SERIES GEN 4 GENERATION – ALLISON
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