P0102 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.
P0102 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.
P0102 est un code defaut lie a systeme de carburant, classe en gravite moderate. Lorsque le calculateur de ton vehicule detecte cette condition, il enregistre P0102 et allume le voyant moteur.
Si ton vehicule a declenche P0102, tu peux remarquer un ou plusieurs de ces symptomes :
Voici les causes les plus courantes de P0102, classees selon la probabilite qu'elles soient en cause :
En general oui, pour des trajets courts. Driveable but the engine will run poorly. With abnormally low MAF readings, the ECU under-fuels the engine, causing lean conditions, hesitation, and possible stalling. Safe to drive to a shop, but long-term lean running can damage catalysts and valves.
Suis ces etapes pour identifier la cause profonde de P0102 :
Les couts de reparation de P0102 varient selon la cause profonde et ton vehicule. Voici des estimations courantes :
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
P0102 se comporte differemment selon ton vehicule. Selectionne ta voiture ci-dessous pour des causes propres au modele, les problemes connus et des estimations de couts ajustees :
2007-2024
Nissan's hot-film mass air flow (MAF) sensor is a known weak point (Qashqai, Juke, Note, Micra and the QR-engined Altima and X-Trail), so P0102, a low MAF signal, is very often the sensor itself or its connector rather than a wiring fault. An over-oiled aftermarket air filter is a common trigger, so fit an OEM Hitachi MAF.
2006–2024
BMW N52, N54, and N55 engines use Bosch hot-film MAF sensors that degrade reliably around 120,000 km. The MAF element becomes coated with crankcase oil mist from the PCV system, which lowers its readings. On the N54, P0102 often accompanies a cracked intake charge pipe under the manifold. INPA shows live MAF values in g/s for comparison against the workshop spec.
Couts estimes pour les proprietaires de BMW 3 Seriesajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a BMW
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2008–2024
The Golf TFSI (EA888) commonly throws P0102 when the carbon buildup on intake valves restricts airflow enough to skew MAF readings low at idle. Walnut blast cleaning of the intake valves is the standard fix on the EA888. The intake charge pipe between the MAF and throttle body also cracks at the dogbone mount on high-mileage cars, creating air leaks after the sensor.
Couts estimes pour les proprietaires de Volkswagen Golfajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Volkswagen
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2008–2024
B8 A4 2.0 TFSI is notorious for MAF failures around 100,000 km. The Bosch hot-film element loses sensitivity from carbon and oil contamination. VCDS shows long-term fuel trims pinned above +20% before the code sets. Always inspect the PCV diaphragm at the same time, since a leaking PCV causes oil contamination that ruins replacement sensors quickly.
Couts estimes pour les proprietaires de Audi A4ajuste a la hausse par rapport a la moyenne en raison du prix des pieces specifiques a Audi
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
2011–2024
The 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.
Couts estimes pour les proprietaires de Ford Focusajuste a la baisse par rapport a la moyenne en raison du prix des pieces specifiques a Ford
Prix estimes au March 2026. Les couts varient selon la region, le vehicule et le garage.
Ces codes apparaissent souvent avec P0102 ou indiquent des problemes connexes :
Yes, short distances. The engine runs lean and rough because the ECU under-fuels based on the low MAF signal. Long-term lean running damages catalytic converters and exhaust valves, so plan the repair within a week.
Often yes. Around half of P0102 cases are resolved by a proper clean with MAF-specific cleaner. Never touch the sensing element with anything, and never use brake or carb cleaner since they leave residue that destroys the hot-wire.
Three common reasons. First, residue from the wrong cleaner contaminated the element. Second, the sensor was already failing and cleaning revealed the underlying fault. Third, the air filter or intake boot was not reseated correctly, creating a new air leak. Inspect all three before replacing the sensor.
Typically 150,000–250,000 km on petrol engines if the air filter is changed regularly. Diesel MAF sensors tend to last longer (less contamination from PCV blow-by). BMW N52/N54/N55 and Audi 2.0 TFSI MAF sensors are well-known early failures, often before 120,000 km, especially with aftermarket oiled air filters.
P0101 repair often costs under €15: cleaning the MAF sensor fixes about half of cases. If that fails, replacement runs €70 to €380. Step-by-step fix guide.
The Reduced Engine Power message is the ECU cutting throttle to protect itself. Here is what triggers it, whether you can drive, and what the fix costs.
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Branche un adaptateur OBD2 Bluetooth standard, scanne les codes et obtiens un diagnostic par IA avec niveaux de gravite et estimations des couts de reparation.
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