Diesel Particulate Filter Regeneration Too Frequent
Table of contents
P2459 RAM Possible Causes
- Diesel Particulate Filter (DPf) Restricted
- Faulty Diesel Particulate Filter
- Fuel system or air handling system sensor failure
- Base engine failure
- Fuel system failure
- Air handling system failure
How do I fix code P2459 RAM?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P2459 RAM code
The cost of diagnosing the P2459 RAM code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2459 RAM Description
The engine aftertreatment system monitors the soot load in the Diesel Particulate Filter. Under normal operating conditions the Diesel Particulate Filter is self-cleaning, where soot is converted to ash. The soot load in the aftertreatment Diesel Particulate Filter (DPF) is estimated using the Exhaust Differential Pressure Sensor and the calculated soot output of the engine. The Powertrain Control Module (PCM) will set this fault if it detects that the time between two regeneration events is less than the calibrated time threshold. The PCM will illuminate the MIL lamp immediately when the diagnostic runs and fails. The driver will be notified via the vehicle’s EVIC Message Center. The PCM will turn off the MIL lamp immediately after the soot load has dropped below the Moderately Severe Level Threshold. The Diagnostic Trouble Code (DTC) will set if between two Diesel Particular Filter regeneration events, the DPF soot loading rate is faster than the threshold or if the time between two regeneration events is less than the calibrated time threshold.