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Hesitates while accelerating

Tiny
BLESSING EWOBOR
  • MEMBER
  • 2004 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 105,432 MILES
Hi, the vehicle hesitate while accelerating. I scanned the vehicle, the only code found was P0778 (pressure control solenoid B). I drained out the transmission oil and loosen all the necessary bolts for me to access the solenoids. The oil was smelling like burnt oil. I removed the connector to the solenoid and tested each of the solenoid using battery (I don't know the exact solenoid), they seems to function well mechanically (coming in and out). I fasten all the loosen bolts, replaced the transmission oil and test drive the vehicle but there was no improvement, the problem persist, LoL. What else could I do?
The way I tested the solenoid, is it the best way to tested?
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Sunday, December 6th, 2020 AT 6:35 PM

18 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Here are repair guides to properly test the entire system relating to the code P0778. Just applying voltage to the solenoid doesn't ensure that is the problem. Those solenoids are controlled by the ECM- engine control module as well. I've attached the picture diagnostic steps below for your car. Hope this helps and thanks for using 2CarPros.
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Sunday, December 6th, 2020 AT 7:30 PM
Tiny
BLESSING EWOBOR
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  • 663 POSTS
Thank you.
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Monday, December 7th, 2020 AT 3:46 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome.
Keep us updated as to what you find. Thanks again for using 2CarPros.

Danny-
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Tuesday, December 8th, 2020 AT 2:06 AM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Good morning sir
Could I get a chart on the Time the solenoid should respond (open or close) with the engine speed?
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Thursday, August 5th, 2021 AT 12:34 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Unfortunately, we don't have that type of a reference in our guides. That would be information that only Toyota or the transmission manufacturer could provide. Sorry. Hope this helps and thanks again for using 2CarPros.
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Friday, August 6th, 2021 AT 12:15 AM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Okay sir, that you very much.
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Friday, August 6th, 2021 AT 6:21 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Were the diagnostic steps posted prior able to help? Thanks again for using 2CarPros.

Danny-
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Friday, August 6th, 2021 AT 7:14 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Yes, thank you sir.
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Friday, August 6th, 2021 AT 7:49 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome!

Thanks again for using 2CarPros and we hope you will use our site again in the future when needed.

Danny-
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Friday, August 6th, 2021 AT 10:14 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Good morning, sir, please could I get road test parameters.
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Tuesday, September 28th, 2021 AT 6:27 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

I noticed it has been a couple of days since you've been contacted. Let me know what parameters you are looking for and I'll try to get them for you.

Let me know.

Joe
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Thursday, September 30th, 2021 AT 7:37 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Good morning, sir. I mean road test rest on the transmission indicating the speed at which the transmission has to shift into different gears.
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Friday, October 1st, 2021 AT 7:14 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

I don't ever remember seeing something that provides a speed for an automatic to shift. There are many variables that cause it to shift at different speeds.

I will ask the site owner to see if he has heard of one.

Joe
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Saturday, October 2nd, 2021 AT 6:24 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Good evening, sir. Maybe you don't understand what I asked.
Procedures for road test.
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Saturday, October 2nd, 2021 AT 7:34 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

Take a look below and let me know if that is what you needed.

Take care,

Joe
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Sunday, October 3rd, 2021 AT 5:09 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Good morning, sir. I have disturbed a lot as rat these days, I sincerely apologize for that sir.
Thank you, sir.
Sir, if you refer to the first diagram it was saying something like automatic shift schedule. I don't know if you have that sir.
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Sunday, October 3rd, 2021 AT 6:01 PM
Tiny
BLESSING EWOBOR
  • MEMBER
  • 663 POSTS
Sir, is the transmission 3 gear speed, 4 or 5?
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Sunday, October 3rd, 2021 AT 6:31 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Hi,

I'm sorry. I don't have the shift schedule. I never remember seeing one in the past. As far as the transmission, it is a U241E, a 4-speed automatic transmission.

If you look at the attachment below, that is the only reference I have for shift points/schedules.

Let me know if you have other questions.

Take care,

Joe

See pic below.
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Monday, October 4th, 2021 AT 6:10 PM

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