Could anyone point out the location of Mass Airflow Sensor, in the photo? Thanks.

Is that a petrol engine, 3-cylinder?, we're a bit light on background information here.

If it is a petrol, you won't find a MAF sensor. They use MAP instead. Cleaning it almost never helps with anything. 

Thanks for reply. It`s a Fabia 2010 1.2 70bhp 542. Petrol. For a few months, the car has hesitated on acceleration, in lower gears. Yesterday, EML came on, but the hesitation when accelerating, has disappeared. Car now runs perfectly. Would faulty MAP sensor cause this? Thanks again.

Unlikely to be anything to do with the MAP sensor. How many miles has the car done?

 

Since the engine light has been on, there will be one or more fault codes stored in the memory of the engine ECU. It would be optimal to read those for further narrowing down of possibilities. 

Whereabouts are you? Someone nearby may have the kit required to help you, for example if you were anywhere near me (S. Oxon) I could plug in a laptop with a VCDS cable and see what it's saying.  

Thanks Pete. 104k miles. I am way down in Devon. I will pop it down to local garage. Thanks again.

Do you have any service records that show when engine air filter was last inspected or replaced? Or spark plugs?

No, but i could change filter and plugs anyway. Strange how car is running perfectly, since EML made an appearance.

That may indicate that the engine ECU has 'decided' that the input from some or other sensor is untrustworthy, and changed to an operating strategy that ignores that input.

1 hour ago, Breezy_Pete said:

That may indicate that the engine ECU has 'decided' that the input from some or other sensor is untrustworthy, and changed to an operating strategy that ignores that input.

It would be "simply clever" of VAG to actually do that. I don't believe they ever have though unless the sensor is disconnected.