luisejohnson59
Mass Air Flow Sensor Defect
Summary of the thread
The conversation centers around a 2005 Nissan President experiencing symptoms indicative of a faulty mass air flow sensor, such as increased fuel consumption, engine stalling, a check engine light, and smoke during acceleration. The initial suggestion was to check the air filter, but it was already replaced, leading to the conclusion that the sensor itself might be defective. The final resolution involved taking the car to a certified shop where the mass air flow sensor was confirmed to be faulty and subsequently replaced, resolving the issue.
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4 comment(s)
luisejohnson59 (community.author)
Thanks. The air filter was replaced recently. What happened with your BMW? Did you have to replace the sensor, or was something else the problem?
christopher_fuchs73
Yeah, cleaning the air filter was only a temporary band-aid for me. The performance decline came back hard. I had to replace the mass air flow sensor. Honestly, after all the messing around and the cost of the sensor, I probably should've just gone to the workshop in the first place. It's a pain, but at least you know it's done right. Plus, they can double-check for any other issues.
luisejohnson59 (community.author)
Understood. Following your advice, I took it to a certified shop. The mass air flow sensor was defective and needed replacement. Total cost was 365€. Issue resolved.
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NISSAN
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PRESIDENT
christopher_fuchs73
Whoa, those are classic symptoms! I had almost the exact same thing happen with my old BMW 5 series a few years back. Check engine light, the whole nine yards. Did you try cleaning your air filter? Sometimes a dirty filter can throw things off and mess with the air-fuel ratio. Could be a simple fix before you dive into replacing the sensor itself.