The Quick Answer above is the generic definition. What follows is what is documented for the Ford models that log P0102, checked against manufacturer data and owner reports.
DTC/P0102·Ford
P0102 on Ford: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Ford
P0102 on a Ford means the mass air flow sensor is reporting a voltage or frequency below the expected idle minimum. The ECU thinks almost no air is entering the engine, so it cuts fuel injection accordingly. The root cause is usually a contaminated MAF element, a major air leak after the sensor, or a wiring fault.
Repair cost on Ford€8 - €350
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Ford Focus
2011–2024The Focus 1.6 and 2.0 EcoBoost engines are sensitive to MAF contamination because of high blow-by rates from the turbo. Ford specifically recommends MAF cleaning every 30,000 km on EcoBoost engines as part of preventive maintenance. P0102 on EcoBoost frequently resolves with a single clean. Aftermarket air filters and missed services accelerate the problem.
What causes P0102 on a Ford?
Beyond the generic causes listed on the main P0102 page, these are the documented Ford-specific patterns:
Ford FocusEcoBoost MAF contamination from high blow-by, needs cleaning every 30,000 km
Ford FocusAftermarket oiled air filters accelerate contamination
How to diagnose P0102 on a Ford with OBD2
Follow these steps to pinpoint the root cause of P0102:
- Read live data and check MAF reading at idle. A 4-cylinder should show 2–7 g/s. Below 1 g/s is consistent with P0102
- Inspect the air filter and replace if dirty (a clogged filter pushes MAF readings low)
- Inspect the intake tract from the MAF housing to the throttle body or turbo for cracks, loose clamps, or disconnected hoses
- Clean the MAF sensor using a dedicated MAF cleaner spray (never use brake cleaner or carb cleaner)
- If readings remain low after cleaning and the intake is sealed, unplug the MAF and test drive. If the car runs better, replace the sensor
How much does P0102 cost to fix on a Ford? (EUR)
Estimated repair costs for P0102 in EUR, compiled across makes. Ford parts and labour usually land towards the lower end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0102 on Ford
These codes commonly cluster with P0102 on Ford vehicles:
Looking for the full P0102 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0102 guideSkanyx · Ford
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