I NEED TO REPLACE THE CRANKSHAFT POSITION SENSOR- WHERE IS THAT ON VAN?

SOURCE: Check engine light won't go away

i read it could be the mass air flow sensor and or faulty spark plugs. also be sure to check all the little vaccum hoses for cracks.

SOURCE: Do I need to replace the crank positioning sensor?

the sensor is not to hard to change takes an experienced mechanic a little less tan an hour if it does not brake. it really doesn't hurt your car to run with a faulty sensor but if the sensor competly craps out your car probably won't start i would get it repaired if i were you so your not stranded some where.

SOURCE: Car running rough and stalling

I had the same problem with my dodge neon. Its your transmission slipping. My car had to have all the transmission flushed and it helped alot, but the longer you let it go, the damage could be permanent.

SOURCE: Engine warning light on Mazda MPV 2002

There seem to be 4 sensors along the way in the air intake and emissions system.

My Check Engine light indicated a bad sensor 1, bank 2 code (I think).

I had my mechanic replace the sensor that was indicated as faulty... cost = $191.

Then the Check Engine light came on again (with a different code), and I had to leave the van with him all day.

Cost to replace and install that sensor = $115.

My advice: if the Check Engine light stays on *AND* your vehicle is riding rough, get it fixed.

Otherwise, put a piece of tape over that Check Engine light and save a couple hundred dollars!

Hope this helps, I do trust my mechanic fully.

Testimonial: "Thanks for taking the time to post your advice re my MPV problem. Although not a definitive solution, it's certainly good advice."

SOURCE: replace crankshaft position sensor

Go to your local auto parts store and by a manual. It will tell you where it is.