2002 mazda millenia mass air flow sensor

mounted on round hose coming off air box to fuel injection unit

check out below:

Should be in line with the air intake. Locate air cleaner box. Follow large intake tube, rubber, about 3 inch diameter, to intake. Along the way look for a box in line. There should be an electrical connection going to it. That box should be the Mass Airflow Sensor. If you want to remove first disconnect battery to be safe and then disconnect the electrical connection. Should find a hose clamp either side of box. Loosen both and pull rubber tube back to release box. The actual sensor is inside. Just look through cener of box and you'll see something like a bar. The air flow sensor itself is much like a fragile ribbon of metal. VERY DELICATE. I've heard and headed that you should only use Mass Airflow Sensor cleaner as other automotive solvents are too harsh and leave a residue. The sensor can't tolerate any residue. In fact that's why you and I are about to clean it or have it cleaned. I'm getting Code P2187 Bank 1 Lean at idle. If the mass airflow sensor 'thinks' it has the correct amount of air but doesn't the injectors could be backing off delivery of fuel and assist in creating my 'lean' condition.

Hope this helps.

Try a full reset. Disconnect the car battery for about an hour. Reconnect the battery then try it again. Doing a full reset should reprogram the EEC to go back to factory settings. It worked doing this on my Ford. I would suggest it will work on a Mazda.

P1195 refers to the map sensor, not the egr solenoid. It could be a bad map sensor, bad wiring, or possibly a bad or loose vacuum hose.
P1522 refers to the air control flap actuator on the intake manifold. You can see about yhat at the link below.
https://www.autocodes.com/p1522_mazda.html

P0103 MAZDA - Mass Air Flow Sensor High Input Signal Possible causes - Dirty mass air flow sensor
- Dirty mass air filter
- Mass air flow sensor harness is open or shorted
- Mass air flow sensor electrical circuit poor connection
- Intake air leaks
- Faulty mass air flow sensor

Fig. Component Location Chart-2000 MPV

1 PCM 2 Mass air flow (MAF)/intake air temperature (IAT) sensor 3 Throttle position (TP) sensor 4 Fuel tank pressure sensor 5 Engine coolant temperature (ECT) sensor 6 Crankshaft position (CKP) sensor 7 Camshaft position (CMP) sensor 8 Knock sensor 9 Heated oxygen sensor (HO2S) (front, LH) 10 Heated oxygen sensor (HO2S) (front, RH) 11 Heated oxygen sensor (HO2S) (rear, LH) 12 Heated oxygen sensor (HO2S) (rear, RH) 13 EGR boost sensor 14 Power steering pressure (PSP) switch 15 Main relay


Fig. Component Location Chart-2001 MPV

1 PCM 2 Mass air flow (MAF)/Intake air temperature (IAT) sensor 3 Throttle position (TP) sensor 4 Engine coolant temperature (ECT) sensor 5 Crankshaft position (CKP) sensor 6 Camshaft position (CMP) sensor 7 Knock sensor 8 Heated oxygen sensor (HO2S) (front, LH) 9 Heated oxygen sensor (HO2S) (front, RH) 10 Heated oxygen sensor (HO2S) (rear, LH)* 11 Heated oxygen sensor (HO2S) (rear, RH)* 12 EGR boost sensor


Fig. Component Location Chart- 2002-06 MPV

the IAT sensor is part of the Mass Airflow sensor. here is a picture of that sensor.

i think you have a vacumm leak po 170 is a lean code look for leaks also check and clean mass air flow sensor and you may have to take to dealer for that throttle screw that does not adjust the idle speed take carb cleaner and carfully spray around engine when running listen for change becareful around coils and exaust.

Your map sensor, otherwise known as mass air flow sensor is probably bad. You should replace it. it is normally located between the air filter and the throttle body. It senses how much air is going into the throttle body so the car knows how much fuel to inject.