Ford Focus and Mondeo Common OBD-II Codes: EcoBoost and TDCi

Ford Focus and Mondeo are among the most popular Fords in Europe. Focus III/IV with 1.0/1.5/2.0 EcoBoost and Mondeo V with 2.0 EcoBoost have specific issues related to turbocharging and direct injection. The TDCi diesel also has well-documented characteristic problems.

EcoBoost 1.0 3-cylinder (Focus III/IV, Mondeo V): Small Engine Specifics

P0302 / P0303 — Misfires in Cylinder 2 or 3

EcoBoost 1.0 specifics:

• Due to the 3-cylinder layout, cylinder head cooling is uneven → head gasket wears unevenly
• Typical mileage for first occurrence: 50,000–75,000 miles
• Test: Check coolant level (loss indicates internal HGF leak) and check oil for milky white appearance (coolant mixing)

Live Data:

• Misfire Count Cyl 2/3 — when warm (not on cold start) → HGF problem
• Engine Coolant Temperature — if rising faster than normal → overheating risk

P0299 — Underboost (1.0 EcoBoost)

• Small Garrett turbo — wears from 60,000+ miles
• Wastegate actuator — plastic actuator degrades under thermal load
• Compressor outlet gasket

Live Data:

• Boost Pressure Desired vs Actual at 3,000 RPM no load: > 30 kPa difference → find the leak

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EcoBoost 1.5 and 2.0 (Focus IV, Mondeo V): Carbon Deposits

P0300 — Random Misfires (GDI Carbon)

EcoBoost 1.5 and 2.0 are direct injection engines. Intake valve carbon accumulates after 40,000–50,000 miles of city driving.

Live Data with carbon deposits:

• STFT B1 at idle: fluctuating between -5% and +8% → uneven combustion
• Misfire Count — all cylinders (P0300) when cold, improving after warm-up

Solution: Walnut blast (intake valve cleaning with walnut shells).

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TDCi 2.0 (Focus II/III, Mondeo V, C-Max): Diesel

P0087 — Rail Pressure Below Threshold (2.0 TDCi)

Ford 2.0 TDCi uses Delphi Common Rail (unlike the Bosch units in some other models).

Causes:

• Worn Delphi HPFP (DFP3)
• Clogged fine fuel filter (replace every 25,000 miles)
• Faulty pressure regulator on HPFP

Live Data:

• Fuel Rail Pressure Actual at 2,000 RPM: normal 600–900 bar
• Fuel Rail Pressure Desired vs Actual: > 80 bar difference → HPFP or regulator

P2002 / P244A — DPF

TDCi 2.0 Euro 5/6 has a DPF with active regeneration.

Live Data:

• DPF Soot Load g → at 45–55g → regeneration triggers
• DPF Regen Active: YES — don’t stop the engine

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PowerShift DCT (Focus II/III, Kuga): 6-speed Dual Clutch

Ford PowerShift (DCT) — equivalent to DSG. Fitted to Focus II ST, Focus III 2.0T, Kuga.

Known issues:

• Shudder/judder pulling away (especially in traffic at < 10 mph)
• “Slip” on 2nd gear during acceleration at 15–25 mph

Codes:

• P0893 — Gear overlap: malfunction
• P0700 — Transmission: general fault
• P17F0 — Clutch A: clutch adaptation (Ford-specific)

Live Data:

• Clutch A Engagement Point — bite point (mm or %) — too low = clutch worn
• DCT Oil Temp — above 140°C → limp mode

Solution: Ford released a TCU calibration update and new clutch packs. Check with Ford dealer.

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Ford IDS and ELM327 Compatibility

Ford uses Microsoft CAN over OBD-II (ISO 15765).

Standard ELM327 (Mode 01/03): Basic codes and standard PIDs.

Ford-specific codes and Live Data: Requires adapter with UDS support (Mode 22/27). Car Diagnostics supports the full set of Ford-specific PIDs.

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Summary Table

Model	Engine	Top Codes
Focus III 1.0 EcoBoost	Fox 3-cyl	P0302 HGF, P0299 turbo
Focus IV 1.5 EcoBoost	Dragon 3-cyl	P0300 carbon, P0299
Mondeo V 2.0 EcoBoost	EcoBoost	P0300 carbon, P0420
Focus II/III 2.0 TDCi	Delphi CR	P0087 HPFP, P2002 DPF
Focus III PowerShift	DCT 6-speed	P0893, P17F0

EcoBoost engines are a good choice with proper maintenance. Key: oil every 6,000 miles, timely TDCi fuel filter replacement, and attention to early symptoms of HGF on the 1.0.

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