MAF Sensor Code Keeps Coming Back
If you've already replace the MAF sensor, on your 2.5L Grand Vitara (or 2.5L Chevrolet Tracker), with an after-market sensor and the problem and MAF trouble code keep coming back, then there's a good chance the MAF sensor you just bought is defective.
Wait, a new part not working? Yes, this is a very common issue with these MAF sensors for this particular application and it's something you should be aware of.
The majority of people that have had this experience where able to fix it only by finding an OEM Hitachi replacement at a junk yard or online.
If you go the online route, Ebay is your best bet. On Ebay, you'll need to search for the ‘throttle body assembly’ since they are mostly sold as a complete unit (usually goes for about $250 for the entire unit).
If you do buy the entire unit, you can then remove the MAF sensor and install it on your Grand Vitara.
If this info really saved the day, buy me a beer!