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- 2014 CX-5 Touring
Newer engines have more sensitive MAF sensors that can get fouled by any excess oil ingestion. I had to shelve my BMC filter after I started getting CEL (implausible air flow codes) on my Porsche. Had to clean the MAF and go back to a OEM filter. BTW, it was a new-ish filter, one I hadn't yet cleaned and re-oiled. So the offending oil was from the factory oiling.
Well that's interesting. From K&N FAQ:
Will a K&N filter cause my vehicle's mass air sensor to fail?
No. This is an "urban myth" and has not been supported by any factual evidence. The oil does not come off of a K&N air filter when it is in use, even when over-oiled or in extreme air flow rates exceeding 1000 CF'M.
If somehow K&N air filter oil were to make contact with a mass air sensor, the oil would not cause the sensor to fail. We have intentionally coated mass air sensors with our filter oil, and monitored the sensors' output when installed in daily driven vehicles. These sensors continued to function normally, even after being sprayed and submerged in K&N air filter oil. K&N air filter oil does not cause problems with mass air sensors.
https://www.knfilters.com/maf/massair.htm