Computer problem?

I have a 1997 Plymouth Voyager.

My transmission seems to be acting up lately.

My brother scanned my car and the codes/readings he got were:

P0720

Output Speed Sensor

P0734

Gear 4 ratio incorrect

P0733

Gear 3 ratio incorrect

P1698

Manufacturer controlled & axillary outputs

P071

o2 sensor

P0700

Transcontrol malfunction

I am wondering if this is a sensor problem or an entire transmission problem. Thanks for any help!

You don't mention a mileage, that can help alot in determining the amount of wear expected.

Have you checked the level and condition of the transmission fluid? Low fluid will affect how the transmission works since it is trying to move the pistons and valves inside with air instead of fluid. And if the fluid hasn't been changed in a while it can lose its lubricity. If you look at the fluid it should be a red or faint pink and be clear, not cloudy. Fresh transmission fluid also has a distinctive odor whereas old fluid will smell burned.

If you find that the transmission fluid has been left in there well past the owner's manual guidelines, whatever you do, DO NOT ASK FOR A POWER FLUSH. This can cause tiny bits of sludge and oxidation that have formed on the tranny's internals to be dislodged and redeposited in the valve body, and can cause transmission failure.

Instead, have the fluid and filter changed (have someone reset the stored codes, too), drive for a few hundred miles, and then change the fluid again, and repeat once again. This will dilute the old fluid gradually and also serve to help redissolve the sludge and varnish that had formed. After the third fluid change, it should be a clear red color.

However, if the computer is still giving you problem codes after the first change, then you may be looking at something more serious. Let us know how it goes and good luck!