Symptom Tree t147
| Cause | Correction |
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For vehicles that have the diesel particulate lamp illuminating frequently, high exhaust temperature lamp (if equipped) illuminating frequently, and/or requires frequent stationary regenerations.
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Electronic fault codes active or high counts of inactive fault codes |
View and troubleshoot the fault codes with INSITE™ electronic service tool. Refer to the Troubleshooting and Repair Manual, CM871 and CM876 Electronic Control System, ISX and ISM Engines, Bulletin 4021560. |
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OEM or customer selected inhibit feature is preventing active regeneration during vehicle operation |
Check the aftertreatment system inhibit feature with INSITE™ electronic service tool. Change the vehicle route and/or duty cycle so the inhibit feature does not prevent active regeneration or contact OEM/customer about changing inhibit features. |
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Extended operation of engine in low duty cycle, extended idling and/or low ambient temperatures |
Check the aftertreatment system trip information with INSITE™ electronic service tool. Low duty cycle applications can possibly require more active regeneration time to keep the aftertreatment system functioning correctly. Change the vehicle route and/or duty cycle to increase the load on the engine in order to decrease the amount of active regeneration time. |
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Aftertreatment Diesel Particulate Filter is full of ash |
Maintenance interval for ash cleaning has been reached. See the corresponding Owners or Operation and Maintenance manual for the engine being serviced. Refer to the Aftertreatment Diesel Particulate Filter – Excessive Ash Cleaning Troubleshooting Symptom Tree. |
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Engine produces excessive black smoke |
Refer to the Troubleshooting Performance Symptom Tree. |
