Powertrain, generic (extended)

P2463 Diesel Particulate Filter Restriction - Soot Accumulation (Bank 1)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2463 means the soot load in the particulate filter has passed the level at which the engine still regenerates it on its own. GM's 2009 Duramax sets it at 70 g or more for 5 minutes, the 2014 Cruze 2.0 diesel at more than 32 g for 30 s, both as Type A codes; GM's 2018 diesels use the pressure-based soot model with 120 failures in 150 samples. On the Cruze the ECM then turns on the MIL, reduces engine power and blocks normal regeneration, so a dealer service regeneration is needed. GM's bulletin on the related driver messages notes that the filter cleans itself about once per tank and needs driving above 50 km/h; extended idling and stop-and-go traffic keep it from finishing. The underlying cause is not always the driving: Stellantis traced P2463 with P2453 to broken differential pressure sensor wiring and PCM grounds, Mack to a failed aftertreatment fuel doser. Check those before regenerating, or the code returns.

Likely causes

Regenerations not completed because of short trips or long idling
Differential pressure sensor, its hoses or wiring reading too high
Fault that prevents regeneration (fuel doser, temperature sensor)

Symptoms

  • DPF full or exhaust filter message in the cluster
  • MIL on and reduced engine power
  • Higher fuel consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–2,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

What to check first

  1. Drive at steady motorway speed if the manual allows
  2. Check sensor readings
  3. Perform a forced regeneration with a scan tool if needed

Parts involved

diesel particulate filterdpf differential pressure sensorexhaust gas temperature sensoraftertreatment fuel doser

Related codes

P2453P2459P2458P2002P242F

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.