Mass Air Flow Sensor

Hello well im having a problem with my car well suddenly the second gear wonts work after cheking with computer scan we get this message error code p1000 the mecanic think its the air flow sensor the most amazing thing is when I turn off the engin the oil comes out from the taransmission gauge plz tell me whats going on? Thanks a lot

I have a 2002 ford taurus with the 3.0 dohc engine and 60000 miles, and recently I got a check engine light with codes of P0172 and P0175, meaning that the engine is running to rich. Could this be a sensor problem or is it something with the fuel system?

The PCM (computer) is like a weatherman. It's right 50% of the time.

I would start with the basics - pretend you're working on a '57 Chevy or something - no computer.
1. Check for vacuum leaks.
2. Check for any other obvious (or not-so-obvious) problems, no matter how small or insignificant.

Now, we look at cause and effect. If you have any actual symptoms, make a note of the symptoms and driving conditions. For instance, are there any funny noises, smells, etc? If there are no actual symptoms, then you can start to look at why you're running too rich.
Are you idling too high? If so, then it could be the idle air control valve. However, if you're idling around 700 RPM, then that's probably not the cause.

The oxygen sensors set their own specific codes when they go bad, so unless there are other codes, I would not worry about them.

The mass airflow sensor is a possible cause, because if it goes bad, it could cause the computer to think there's not too much air, thereby richening the mix.

If these don't do it, then you could take it to the dealer and just run a diagnostic, no repairs, since the car is drivable. They'll charge about $100 to give you the answer, then you decide whether you can do it or not.
Good luck.

Engine Performance problem
2001 Ford Taurus 6 cyl Automatic

About a Month ago My Wife took Our car to Autozone to test it after the check engine light came on. The car ran fine except the light was on.

The test showed to be the MAF Sensor so She purchased it and they just replaced it there. Now after getting the car back the engine light is no longer on but the car is having problems starting and cuts out when the gas is pressed hard or especially at idle.

When starting the car We now have to pump the Gas pedal to start it and it dies when placed in drive or reverse a couple times in the Morning usually.

Thanks for any help

Thank You. It was definitely a defective MAF sensor but after they replaced it the engine light came back on though and after another test now they say it needs the EGR Valve, O2 Sensors, and Intake Air Temperature Sensor replaced even though It ran fan before.

We also took the car back 3 weeks ago to ask about the MAF Sensor and instead of informing us that they are sometimes defective and offering a replacement they just sent Her home and She drove the car for 3 weeks. Could this have caused the other problems?

Thanks! Just finished checking around and noticed a hissing noise and found the leak!

Much Appreciated

My 2001 Ford Taurus recently had the check engine light come on and a few days later started idling rough. It stalls out sometimes at a stop and you have to give it gas to get it started. I had the code pulled and it indicated a lean condition and pointed to either the Mass air Flow sensor or the O2 sensor. I put a different (used) Mass Air Flow sensor but that didn't help at all. What is the chances that I got another bad one (do they tend to go Out?) And is it more likely to be the O2 sensors?

Unfortunately We still have not fixed this problem as I first thought.

I finally broke down, took it to a shop and They said it's guess work from here with no engine light and it's probably a bad sensor since the problem is not always noticeable.

I've noticed It's definitely worse with the air on now that it's warmed up outside.

I still have the 02 sensors from when the problems first started, should I just replace them instead of returning them?

Check engine light is on. Computer lowers rpm so low it shuts down when at idle. Diagnostics say it's the mass flow air sensor. Have replaced five mass flow air sensors, four sets of O2 sesors, 6 sets of spark plugs, the EGR valve and fixed a few vacuum leaks. Diagnostics also say bank 1 is lean. On side mounted engines which is bank 1(The firewall or the radiator side)? And any ideas on clearing check engine light. Everytime repairs are done it's good for anywhere from 100 to 500 miles

Throttle position sensor has not been checked. EGR has just been replaced. If I hold foot on excellorator and maintain rpm at 600 or greater till car warms up it will run fine. If you don't hold accelorator computer lowers rpm down to400 to 450 and after a little while will increase rpm up to 800 or so. Don't notice any miss.