DPF blockage and EGR valve carbon build-up causing limp mode and warning lights on D-4D diesel models.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Start the engine and rev to 3000rpm. Check the dashboard for DPF warning messages and inspect the exhaust for excessive black soot or hesitation.
- Typical repair
- DPF forced regen or replacement · £250–£1,600
