Peugeot 807 Mass Air Flow Meter

Your Peugeot 807's symptoms sound familiar. I have the same model. I had similar issues a while back, and all signs pointed to air intake problems. Did you check the air filter? A clogged filter can wreak havoc on the air-fuel ratio and potentially damage the LMM over time. I was experiencing engine stalling and the check engine light was also illuminated. A faulty sensor can definitely cause these symptoms, and it can lead to increased fuel consumption.

Indeed, the air filter's condition had not yet been examined. However, assuming the air filter is not the sole source of the problem, and the mass air flow sensor itself is defective, did you observe if its failure mode caused any consequential issues or any further damage to other components?

Well, in my case, I didn't push my luck attempting to fix the issue myself. The sensor itself didn't cause any collateral damage that I'm aware of, but I didn't drive the car much once the symptoms became apparent. Do you really want to risk damaging your catalytic converter, or worse? I recommend getting it checked out by a competent workshop as soon as possible. They should be able to confirm the sensor's condition and whether the error is related to something else.

Following your recommendation, I consulted a trusted workshop, and a defective mass air flow sensor was confirmed. Replacement, including labor, amounted to 365€. The symptoms have vanished, and the vehicle is once again performing optimally. Thank you again for confirming my suspicion; your insights were instrumental in resolving this issue efficiently.