Help with P0963 - Toyota Yaris Forums

eseriestv · 06-10-2013, 11:59 AM

Hello folks!

Im having a trouble with my vitz 2010 bought from Japan.

It has built in a CVT transmission and I got the following code with the scanner:

P0963 Pressure control solenoid "A" control circuit high.

Why is that happening? And could somebody please help me with this, since the mechanics here have only suggestions but no real idea how to fix this.

THank you

CTScott · 06-10-2013, 01:11 PM

P0963 Pressure Control Solenoid "A" Control Circuit High (Shift Solenoid Valve DS1)

Using shift solenoid DS1 (inflow to the primary pulley) and shift solenoid DS2 (outflow
from the primary pulley), the ECM controls the line pressure and fluid volume input and
output to the primary pulley according to the vehicle speed and accelerator pedal angle.
As a fail-safe function, if a solenoid is shorted or open, the ECM stops current to the
faulty solenoid.

According the the service manual the cause can be:

1. Open in shift control solenoid DS1 circuit

2. Continuously variable transaxle assembly

3. ECM

The solenoid is located within the internals of the CVT. I don't see it broken down in the parts catalog, so it may not be something that can be replaced.

UberSilver · 06-10-2013, 02:28 PM

If it's showing a code for high pressure? Was the CVT serviced? overfilled?

CTScott · 06-10-2013, 02:43 PM

Quote:

Originally Posted by UberSilver

If it's showing a code for high pressure? Was the CVT serviced? overfilled?

Not high pressure - High (out of range) voltage on solenoid supply circuit, which indicates an open circuit to the solenoid coil.

eseriestv · 06-10-2013, 06:04 PM

Gosh!

I was reading also, and says its high voltage on that solenoid. Is not possible to replace that solenoid?

I also noticed the check engine light shows up mostly in low speed or when braking, but when I speed up the engine is working as if it were in safe mode or when warming up, no matter what the speed is. Sometimes the light is on and sometimes dont. But of course I understand something is wrong with the vehicle.

CTScott · 06-10-2013, 06:27 PM

Quote:

Originally Posted by eseriestv

Gosh!

I was reading also, and says its high voltage on that solenoid. Is not possible to replace that solenoid?

I also noticed the check engine light shows up mostly in low speed or when braking, but when I speed up the engine is working as if it were in safe mode or when warming up, no matter what the speed is. Sometimes the light is on and sometimes dont. But of course I understand something is wrong with the vehicle.

I would check the connectors that plug into the CVT, since the problem is intermittent.

eseriestv · 06-11-2013, 12:37 PM

Thank you CTSCott I sent the car to repair.

I will ask for connector's check before anything else. But the mechanic said he needs to unmount the transmission to access the valve body where the solenoids are located.

I hope this can be easily fixed. Car has no warranty because its imported and had the steering wheel to the right originally.

Tnx anyway

eseriestv · 06-13-2013, 12:28 PM

I have checked the car today. The issue seems to be fixed, maybe was something bad connected altought my mechanic says he repaired some sensor and stuff he cant explain.

Anyway, he's charging about $400 mostly for hand work I believe. Seems okay for me since I tought this couldnt be fixed easily, what do you think?

CTScott · 06-13-2013, 01:02 PM

Quote:

Originally Posted by eseriestv

I have checked the car today. The issue seems to be fixed, maybe was something bad connected altought my mechanic says he repaired some sensor and stuff he cant explain.

Anyway, he's charging about $400 mostly for hand work I believe. Seems okay for me since I tought this couldnt be fixed easily, what do you think?

If it is working fine and it doesn't come back, I would say that isn't a bad price. Do you know if he actually opened the CVT, or did he just fiddle around on the outside of it?

eseriestv · 06-13-2013, 02:39 PM

He is giving me warranty for his job, said the problem wont come back. we tested the car at different conditions and seems okay, the light dont turn on again like the time I only reset the light

He told me he worked in the valve body part, I believe thats in the down part right above the pan to remove the oil. But I will ask again and comment so other users might use the topic.

EDIT: I dont know if is possible to buy this transmission, but how much could cost the same CVT K410 ???

CTScott · 06-13-2013, 03:03 PM

Quote:

Originally Posted by eseriestv

He is giving me warranty for his job, said the problem wont come back. we tested the car at different conditions and seems okay, the light dont turn on again like the time I only reset the light

He told me he worked in the valve body part, I believe thats in the down part right above the pan to remove the oil. But I will ask again and comment so other users might use the topic.

EDIT: I dont know if is possible to buy this transmission, but how much could cost the same CVT K410 ???

Here's a link to one for sale for $5293

http://quickparter.com/oem-parts/3040052040.html

If you ever really had to replace it your best bet would probably be to buy a used one directly from Japan.

eseriestv · 06-13-2013, 06:47 PM

Thanks for the link my friend. So far its good. Im gonna test in a road trip this weekend, I hope the fix last cause I just imported the car and dont want to sell it this soon.

06-10-2013, 11:59 AM	#1
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	Help with P0963 Hello folks! Im having a trouble with my vitz 2010 bought from Japan. It has built in a CVT transmission and I got the following code with the scanner: P0963 Pressure control solenoid "A" control circuit high. Why is that happening? And could somebody please help me with this, since the mechanics here have only suggestions but no real idea how to fix this. THank you

06-10-2013, 01:11 PM	#2
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	P0963 Pressure Control Solenoid "A" Control Circuit High (Shift Solenoid Valve DS1) Using shift solenoid DS1 (inflow to the primary pulley) and shift solenoid DS2 (outflow from the primary pulley), the ECM controls the line pressure and fluid volume input and output to the primary pulley according to the vehicle speed and accelerator pedal angle. As a fail-safe function, if a solenoid is shorted or open, the ECM stops current to the faulty solenoid. According the the service manual the cause can be: 1. Open in shift control solenoid DS1 circuit 2. Continuously variable transaxle assembly 3. ECM The solenoid is located within the internals of the CVT. I don't see it broken down in the parts catalog, so it may not be something that can be replaced. __________________

06-10-2013, 02:28 PM	#3
UberSilver Drives: 08Yaris2D, 88LandCruiser. Join Date: Jan 2013 Location: Alameda,Ca. Posts: 476	If it's showing a code for high pressure? Was the CVT serviced? overfilled? __________________ Give a man a fish, and he'll eat for a day. Sell a man a fish, and you'll both eat for a day.

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06-10-2013, 06:04 PM	#5
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	Gosh! I was reading also, and says its high voltage on that solenoid. Is not possible to replace that solenoid? I also noticed the check engine light shows up mostly in low speed or when braking, but when I speed up the engine is working as if it were in safe mode or when warming up, no matter what the speed is. Sometimes the light is on and sometimes dont. But of course I understand something is wrong with the vehicle.

06-11-2013, 12:37 PM	#7
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	Thank you CTSCott I sent the car to repair. I will ask for connector's check before anything else. But the mechanic said he needs to unmount the transmission to access the valve body where the solenoids are located. I hope this can be easily fixed. Car has no warranty because its imported and had the steering wheel to the right originally. Tnx anyway

06-13-2013, 12:28 PM	#8
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	I have checked the car today. The issue seems to be fixed, maybe was something bad connected altought my mechanic says he repaired some sensor and stuff he cant explain. Anyway, he's charging about $400 mostly for hand work I believe. Seems okay for me since I tought this couldnt be fixed easily, what do you think?

06-13-2013, 02:39 PM	#10
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	He is giving me warranty for his job, said the problem wont come back. we tested the car at different conditions and seems okay, the light dont turn on again like the time I only reset the light He told me he worked in the valve body part, I believe thats in the down part right above the pan to remove the oil. But I will ask again and comment so other users might use the topic. EDIT: I dont know if is possible to buy this transmission, but how much could cost the same CVT K410 ???

06-13-2013, 06:47 PM	#12
eseriestv Drives: Toyota Vitz 2010 Join Date: May 2013 Location: Bolivia Posts: 20	Thanks for the link my friend. So far its good. Im gonna test in a road trip this weekend, I hope the fix last cause I just imported the car and dont want to sell it this soon.