Ford Mondeo: 2.0 TDCi diesel particulate filter blockage

Mk5 Mondeo TDCi models require sustained motorway driving to passively regenerate the diesel particulate filter (DPF). The short-trip urban usage typical in Australian cities prevents adequate regeneration, leading to progressive blockage. Symptoms escalate from a dashboard warning to forced limp mode. A forced regeneration clears the fault temporarily but does not resolve the underlying usage pattern issue. Repeated failed regenerations also cause diesel contamination of the engine oil.

• DPF warning light on the instrument cluster
• Reduced power and limp mode activation
• Excessive black smoke on acceleration after warning light illuminates
• Unexplained increase in engine oil level from diesel dilution during failed regeneration

1. 1

   Scan for DPF soot load percentage using a Ford IDS-compatible scanner.

2. 2

   Check oil level — a rising level indicates diesel contamination.

3. 3

   Ask about typical usage pattern and whether the car is used for mostly short urban trips.

Parts involved: Diesel particulate filter.

≈A$370 to ≈A$2,580 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Has the DPF warning light ever illuminated?”
• “Is this vehicle used mainly for short city trips?”
• “Has a forced DPF regeneration ever been performed?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.