Bob's Mechanical Repairs

Ford P242F

Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email [email protected].

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DPF ash accumulation limit reached on Ford diesel — DPF at end of life, not a regen issue.

Ford P242F — DPF ash accumulation limit reached on Ford diesel — DPF at end of life, not a regen issue. Typical UK independent garage cost: £650–£1900.

What actually causes P242F on a Ford

P242F is fundamentally different from P2002/P2463 — this is ASH, not soot. Regens don't remove ash. On 1.6 TDCi we see this around 120–150k miles. Transit 2.2 TDCi it's usually earlier because of urban use and short trips.

Ford engines that log P242F

  • 1.6 TDCi DV6 (Focus, C-Max, Mondeo)
  • 2.0 TDCi (Mondeo, S-Max, Galaxy)
  • 2.2 TDCi Transit

How we diagnose P242F on a Ford

  1. Read DPF ash mass and mileage (IDS/Forscan)
  2. Confirm ash mass > 100g — regen won't fix
  3. Consider off-vehicle ultrasonic DPF clean (£250–£400)
  4. Replace DPF only if clean fails or cell damage present

The common misdiagnosis to avoid

Attempting a forced regen — won't help, ash doesn't burn out. Also, DPF cleaning services (ultrasonic/baking) genuinely work here where forced regen doesn't. Try clean before replacement.

Ford P242F repair cost in the UK

Expect £650–£1900 including parts and labour at an independent garage. Main-dealer quotes on Ford are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.

Bob's workshop tip

1.6 TDCi Focus — try a professional off-vehicle DPF clean first. £300 saves £1,500.

Codes usually seen alongside P242F on Ford

  • P2002
  • P2463
  • P244A

Symptoms drivers report with P242F

  • DPF warning light on the dash steady (not flashing) — often accompanied by 'Engine System Fault, Service Now'
  • Reduced Engine Power warning / limp mode after another attempted regen
  • Car has done multiple 'passive regens' recently (higher revs at motorway cruise, warm smell like burning) that ended incomplete
  • MPG dropped 5–12 mpg over recent months as the DPF partially blocked
  • Slight loss of turbo response and top-end power, engine feels 'flat'
  • Exhaust smells 'hot' or 'sulphurous' after a long drive — sign of forced-regen attempts

Repairs that clear P242F

  • Replace or professionally clean DPF

For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P242F guide.

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