Oro srauto matuoklio vadovas
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The MAF (Mass Air Flow) sensor measures the volume and density of air entering the engine, allowing the ECU to calculate the correct fuel injection quantity. A faulty MAF causes poor fuel economy, hesitation, and diagnostic codes like P0100 and P0101. At CarParts247 we stock MAF sensors from Bosch, Pierburg, and Hella for accurate engine management.
MAF sensor fault symptoms
MAF sensor faults cause the ECU to use default fuelling values, resulting in noticeably different engine behaviour. Symptoms can range from subtle economy changes to severe drivability problems.
- Check engine light with MAF codes (P0100, P0101, P0102, P0103)
- Poor fuel economy — ECU over-fuels to compensate for inaccurate readings
- Hesitation and flat spots during acceleration
- Rough or uneven idle — incorrect air measurement at low flow
- Black smoke from the exhaust — rich running condition
Cleaning and replacement
Hot-wire MAF sensors can sometimes be cleaned with specialist MAF cleaner spray. Never use brake cleaner or contact cleaner — these damage the delicate sensing element.
- Use only dedicated MAF cleaner spray — other solvents damage the hot-wire element
- Spray the sensing element gently from 10cm away, allow to air dry completely
- Check the air filter — a dirty filter allows contaminants to reach the MAF
- Inspect the intake ducting for splits or loose connections that cause unmetered air
- If cleaning doesn't resolve the fault, replace the sensor with an OEM-quality unit
Kategorijos puslapis
- Peržiūrėti tinkamas dalis
MAF jutiklio gedimai — P0100 kodai, valymo patarimai ir kaip sugedęs MAF veikia degalų ekonomiją ir galią.
Susiję gidai
- Droselinio vožtuvo pirkimo vadovas
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- Kuro bako pirkimo vadovas
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Dažnai užduodami klausimai
Can I clean the MAF sensor?
Yes, using dedicated MAF sensor cleaner only. Spray the sensing element and let it air dry. Never use brake cleaner, carb cleaner, or compressed air — these damage the delicate hot-wire element.
How does a faulty MAF affect fuel economy?
The ECU defaults to a rich fuelling map when MAF readings are unreliable, increasing fuel consumption by 10-25%. You may also notice reduced power and black exhaust smoke.
What causes MAF sensor failure?
Contamination from oil vapour, dirty air filters, or aftermarket air filter oil. Water ingestion and electrical connector corrosion are also common causes.
Should I reset the ECU after replacing the MAF?
It's good practice to clear any stored DTCs and allow the ECU to re-learn fuel trims. Some vehicles adapt automatically within a few drive cycles.
How much does mass air flow sensor replacement cost?
The price of a mass air flow sensor depends on your exact vehicle and the brand you choose. Enter your registration above to see parts confirmed to fit, then compare prices from the brands we stock on this page. Free UK delivery on orders over £99.
Susiję gidai
Elektroninio droselinio vožtuvo valymas ar keitimas — laisvosios eigos problemos, padėties jutiklio gedimai ir adaptacija.
Fuel Pressure Regulator Buying GuideHard starts, black smoke, and fuel smell — how a fuel pressure regulator works, failure symptoms, and replacing it without damaging injectors.
Intake Air Hose Buying GuideCracked or collapsed intake hoses cause poor performance and false MAF readings — how to inspect, diagnose, and replace rubber air intake ducting.
Kuro bako pirkimo vadovasRūdys, nuotėkiai ir kuro tarša — plieniniai ir plastikiniai kuro bakai, talpų specifikacijos ir keitimo atsargumo priemonės.
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