Is there any chance that an o2 sensor (bank 1 sensor 1) be messing up the speed sensor? My cel give me both codes p0135 and p1705? I purchased both sensors today and I don't no if I should replace both right away or if I should first replace the o2 and see if it corrects the speed sensor. Correct me if I'm wrong.

 

Bump bump georgejet or someone help!

 

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As I remember, you have three separate codes. for three unrelated systems.
1) O2 sensor,
2) trans speed sensor ( exact wording I do not remember)
3) gear range sensor (again do not remember wording)

All three are separate, ( gear position, is external to the trans, mounted to the side of the case, the other is internal to the trans).

One problem a lot of people to not realize is that when the computer sets a code. It sets the code because it sees a input that is out of the range that it expects to see. You must keep in mind that the error can not only be the sensor, but it can be the wire harness that hooks the computer to the sensor.

IE the computer cannot tell if there is a bad wire, or a bad sensor. All it knows is that the input is bad, so it sets a code, as it has been programed to do.

So in your case, the first thing I would look at is what is common to all these issues?

The wiring harness. The harness leaves the computer, runs thru the firewall. And then splits into several different directions. One section runs between the firewall and the rear cylinder bank ( and has the wires that go to your "bad O2 sensor"). The harness continues towards the drivers side of the car,
where, several wires go to the trans speed sensor. The harness continues on to several other components, which includes the gear range switch.

All three of the codes are from sensors on the same branch of the harness. So as I mentioned before, I would look very closely at this harness, Is it close to the header, is it laying on any metal surface? If it is laying on a surface, lift the harness, inspect the underside of the harness. Look for shinny spots on the metal surface (evidence that the harness has been rubbing back and forth on that surface).

As cars get older, people who work on them do not always secure all components properly, clips get old and break, and extra screws get left out. You need to look at the harness for any signs of damage, including possible melting. You may have to cut off some of the protective cover to check closely. ( auto parts stores sell generic plastic wire loom covering, so that you can re-assemble the harness). And of course a good manual would not hurt.

 

Thanks george... actully it was jus an o2 sensor (bank 1 sen 1) and the speed sensor... im gonna have to get some ramps to sit the car ontop of so i can be more comfortable and make sure to look at the harness the best possible... i already have the sensors (my friend works at toyota got both sensors for $150) - im heading to toyota to pick up a cabin air filter today and an oil filter... so hopefully it stops raining over here (florida) and i can get the car back to normal...