Mazda 626 the hold light is flashing car wont go into 4th gear ..nothing showing up on the computerised scan what could be the problem

my guess is this a automatic or a manual shifted STICK shift cars.

? the key to any help is to say what is there.

we are blind here. (mine was a stick)

how many miles do u have on this car and do u have a teen male in your home

I have this 92 ge 2.0 liter yeh I won't lie I make it work for the 500$ I spent on but now the trans has lost 4th and slips 2nd haven't had the car 12 months and serviced trans and put in new hoses in wen I bought it.. I changed the range sensor twice today with used ones from the wreckers no change at all also on hot days after a decent drive car will rev 5000 rpm in park / neutral 1200rpm in gear considering 2nd hand trans

check battery and battery wires

You basically need the trans rebuilt. The only way the speed sensor could affect any of the shifting problems is if it broke off into the trans. somehow. You could try checking the trans fluid first, or having it changed.

You describe a internal transmission failure Check the transmission fluid what is the color if its blackish then you have transmission failure. Your fix is another transmission rebuilt

the transmission and filter need to be changed quickly, the oil is most likely burnt and/or the filter is covered with funk, once those are swapped then your ride should cruise just fine.

I had the same problem I changed the transmission fluid & put a new filter in the trans, this fixed it good until I put my foot down to overtake the trans kicked down to 2nd gear & the hold light started flashing again & the trans started slipping again. I stressed over it for a day or 2 & then I took it out for a drive & thrashed it, Low & behold it came right. When you change fluid its impossible to get all the old fluid out because the torque converter holds a liter or two under pressure, so when I put my foot down some of the gunk blew through & blocked the pump it looses pressure & cant change gear. You need to get it flushed by a transmission specialist   

I have the same problem with my car I think its the torque converter clutch but you should visit a diagonestic machine just to find out

There a fuse in the fuse box change it and it will shift i think it is a number 15 fuse