I ran the car without the bottom bolt holding the air intake box, so it seemed dust soiled the MAF sensor. I got both P0102 and P0113. I cleaned the MAF sensor with MAF sensor spray and P102 initially went away, but never after that. Nor did the PO113. For other reasons, I replaced the engine with a JDM engine (I am in the US) and the P0113 went away, but not the P0102. Now, after changing the engine, I also have P2196 along with P0102. I understand one of the causes of P2016 could be a bad MAF sensor. I tried both the MAF sensor that came with the engine and the one from my previous engine, but no change. This weekend I will inspect the O2 sensor for physical problems, but could anyone help with why the P0102 is so tenacious and won't go away? Could it be the harness wires, or is that the P0113 that went away? Could it be that both MAF sensors are bad? Do you trust after-market sensors, or should I just buy a new OEM MAF sensor.
For starters, just to confirm, did you disconnect the 12v before you tested each MAF so engine computer had to create new settings rather than defer to the old ones?
PriusCamper, Yes. The car was disconnected. Each time I had the P0102, I cleared it and disconnected the power. But it always came back.
I just looked at some of the threads about this... It does seem as though MAF sensors aren't that durable, which increases the odds that you're simply dealing with two bad sensors and a quick look on Ebay shows that prices for brand a new one sell for as low as $20 so I'm gonna place my bet on new o-ring, new sensor and new whatever else looks iffy, such as the plug and wires, etc.. Buying the cheapest one they sell on there and reporting back to us if it solved the problem may help other people on here save lots of money in the future.
Prius Camper, two things. 1. The engine doesn’t show any symptoms of poor MAF, other than the code. How is that? Could it be that I need to drive it some more now that I changed the engine and sensor? 2. A lot of the $20 sensors on eBay are after market. Would you trust them to work?
For the benefit of people who come to PriusChat myself and others make it a practice of buying ridiculously low priced aftermarket parts to find out if they work. For example we all thought there's no way an aftermarket catalytic converter for $130 would be any good. But because a couple people on here tried it, those folks have helped many others replace their healthy cat with a cheap after market cat and then they sell their OEM cat on ebay to people in California who are being preyed upon by cat thieves. One guy on here got $1350 for selling his. So if you want to help people out spend $20 and find out. It would be much appreciated.
It's true that the community learns from various members' efforts for the sake of science, and it's most helpful when the members doing such explorations make the commitment to take a serious approach and follow through. That is, if one member says "I bought a cheap X and put it on my car last week and the car goes", and another member says "I am interested in trying out a cheap X. I've identified the key features of what an X does, and made sure I have ways I can measure those reproducibly. In advance, before I begin, here is the testing and comparison plan I'm going to follow, here are the values I'm going to report, and I'll report them at one week, one month, one year, ...", the community gets more useful and reliable information from the second approach. Not everyone has the time or inclination to follow that path, which is fine, but it is helpful when someone can.
