1999 Isuzu rodeo obd2 code p0101?

Answer 1

P0101 is a mass air flow circuit out of range code. In my personal experience this code is most often set off by one of two things (or both) The first being a bad intake manifold gasket which is causing a vacuum leak and the second being one or more bad injector o-rings also causing a vacuum leak. The mass airflow sensor itself seldom goes bad. In the rodeos of this vintage the intake gasket is a known weak point. Both are relatively easy to replace with a little mechanical knowledge and a bit more patience. Hope this helps and if you want my personal opinion I'd get rid of the rodeo and get something made in Japan. I've had to wrench on mine way more than I think I should have to for a newer vehicle.