Avensis high fuel consumption and stalling

I'm experiencing issues with my 2018 Toyota Avensis gasoline engine model, with about 197935 km on the clock. The car has higher than usual fuel consumption, and the engine occasionally stalls when idling. The check engine light is on, and I've noticed a puff of smoke upon acceleration. Preliminary diagnostics point towards a defective mass air flow (LMM) meter. I suspect the mass air flow sensor is failing, but before I replace it, has anyone encountered similar symptoms?

4 comment(s)

Sounds familiar. I had similar symptoms on my Avensis – though I didn't check the mileage at the time. Higher fuel consumption was the first clue, then the occasional stall. The check engine light sealed it. Have you checked the air intake system for any obstructions or leaks before suspecting the MAF sensor? I would investigate there first.

Thanks for the quick reply. I visually inspected the air intake for obvious blockages or damage, but didn't find anything immediately apparent. Did your issues resolve completely after replacing the MAF sensor, or were there other underlying problems contributing to the symptoms? I want to be thorough before replacing the sensor.

In my case, replacing the MAF sensor resolved all the issues. It sounds like you've done the basic checks. Given the symptoms and the potential for further damage if the fuel mixture is off, it's probably best to get it checked out by a workshop. They should be able to confirm the MAF sensor is faulty before you replace it. Good luck.

Thanks for your input! I took your advice and brought it in. The workshop confirmed the MAF sensor was defective. The replacement and labor came to 365€. Symptoms are gone now.

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