What does the OBD error code P0100 mean?

I have an engine misfire with the check engine light on in my Nissan N16 Supper Saloon -1300cc - 2000 model year. The engine started to produce less power. An OBD scan gave the error code P0100 (referred to MAF sensor error).

I replaced the sensor, but am still getting the check engine light with engine misfire. What could be the problem?

What should I check?

  • Realize a "misfire" code is going to be different than a P0100 code. Did you check the non-MAF replacement problem before just replacing the MAF? The first thing you should have checked was the MAF circuit to ensure there isn't an issue. OBD-II P0100 says: "The MAF may be disconnected, or a wiring connection may be bad" ... you should really check your wiring. May 20, 2016 at 21:19
  • p0100= Mass Air Flow Circuit Malfunction, it may not be the MAF itself but the circuit (connector,wiring or ecm)
    – Moab
    May 20, 2016 at 21:46

1 Answer 1


Vacuum leaks can cause a bad MAF reading and result in a fault code. I would check The intake boot connected to the MAF sensor for any cracks or holes. I had this code show up on my '94 BMW. I spent the money on a new MAF sensor only to find out that I could have fixed the problem with a $20 intake boot.

  • how did you check for leaks in intake boot ???
    – Milan
    May 21, 2016 at 5:23
  • it literally had a big hole in it. I didn't see it till I took the MAF sensor off
    – rviertel
    May 21, 2016 at 6:11

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