Hi guys-
Just finished replacing my alt. It was soaked in oil.
After driving about 40 miles, my check engine light comes on.
I connected the code reader and I get a 201 code.
That a throttle position sensor malfunction.
I checked prices on these things. They are all over the board, from $100 +/- to $400+.
Is there a way to check and see if the TPS is really going bad, or if it is getting faulty data getting to the unit itself?
The car is running fine.

Last time I had this problem, it was a on a ford minivan and I could hardly get it to run enough to get to a mechanic.
-Thanks in advance-
-C

 

I see on one has replied....I'm getting p0120 on my 1999 Montero NOT SPORT, and seems like I need to replace the TPS. I get the code once every 150 or so miles, still drives ok, but gas mileage is miserable around 13.5mpg, I sold my baby 86 swb monty because of its' miserable mpg...Anyone know if a good cleaning of the existing TPS works? Anyone point me in the direction of where under the hood the TPS is on a 2nd gen Montero? **** like this is why I HATE automatics!!!!!!!

 

Hey! Did you replace your tps. Amazon. $ 95. I have been searching this forum for days and only found one link on how to, but the link takes me no where. I need one for my 98 montero. I looked in the manual but I dont have a scanner. Any help is much appreciated.

 

I wanna install one! I checked code and it was p0120. I ch ohms and it is bad. Just wanted to know how to set it. Thank you.

 

I'm gonna do it when the part comes in. The book said something about using scanner to adjust and to rotate one turn clockwise. I'll see what happens. Thank you very much.

 

Thanks for the replies!

 

The TPS will require a bit of adjustment, or mine did anyway on my 95. I tested mine with a few steps out of ALLDATA. This may differ from your procedure, but may help.

1.Disconnect the throttle position sensor connector.

2.Measure the resistance between terminal (1) (sensor ground) and terminal (4) (sensor power).
Standard value: 3.5-6.5k Ohms



Connect a "pointer type/analog readout" ohmmeter between terminal (1) (sensor ground) and terminal (3) (sensor output)

Open the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion with the throttle valve opening angle.
If the resistance is outside the standard value, or fails to change smoothly, replace the throttle position sensor.

 

Yea from what I'm reading, you have to set it right. Thanks for the info!

 

Thank you!

 

I had to take mine apart and just cleaned it and it worked just fine after a few runs. It takes a little time for it to actually find itself and perform perfect. Good Luck.