Thread: Engine codes

So two engine codes. Cars stalling randomly while driving.
P0102 mass air flow or volume air flow a circuit low input
whats it mean by the volume air flow thing.

And then hen I have a p1133 heated o2 sensor insufficient switching sensor 1. No clue about that one

Check your ign fuse under the hood

Hey, I have the same o2 code as well lol

check your fuse too

All fuses good

Vacuum leak

check the boost bypass valve, map sensor, the little rubber t's around the blower, etc.

If it really is the maf I got a spare one you can try

Insufficient switching: Typically the O2 readings go up and down fast. say 80-100 to 750-800 mV. This is the lean/rich in the exhaust stream that can be seen by the O2. When the code for insufficient pops up, that means the pcm isn't seeing it bounce up and down within the expected parameters.

MAF code could be a bad maf. I like to tap on them with my finger while the car is running. If it stalls or acts up, replace the maf after you check the wiring/connection.

Okay so I was doing some readings last night with the scan tool. Dan and I are thinking my map is bad. I sprayed down all vacuume lines. No jump in idle. And when I scanned it my map sensor reading was low according to dan. Since I don't know what the reading should be