P242F Diesel Particulate Filter Restriction - Ash Accumulation

Powertrain Severity: Moderate Generic OBD-II

The diesel particulate filter is restricted by ash that regeneration cannot burn.

Common causes

  • High mileage DPF
  • Oil consumption
  • Wrong engine oil specification

Symptoms

  • DPF warning
  • Reduced power

What to check

  1. Check ash load value
  2. Check oil specification
  3. DPF cleaning or replacement

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P242F, follow the service information for that make and model.