P0770- Shift solenoid E malfunction

Tiny
DOWNTOWN789
  • MEMBER
  • 2001 TOYOTA COROLLA
Transmission problem 4 cyl Two Wheel Drive Automatic 73500 miles

Hello Auto Experts.

My car shows P0770 code. I replaced tansmission fluid at 71500 miles. I had the code before oil replacement. My tech. Told me to change the oil and clear the code, use it for a while and if it comes back, we need to open the tranny, and change few items, which may cost from 500 to 1200, depends. I drove for almost 1500 miles. And at 73000 miles, the code came back again. So please advice me, the best solution to get rid of the engine light.I am not interested in spending 1000 bucks for the same.

also, I have to hit too much gas to get speed, when stop at a intersection or junction, which was not a problem before. The engine sounds too bad and noisy.

will engine and transmission flush and oil/filter change will help me to get rid off the code and get back the speedy and smooth ride.

Need ur suggestions/advice to get the speed back and get rid of the code forever.
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Friday, April 17th, 2009 AT 4:06 PM

2 Replies

Tiny
MMPRINCE4000
  • EXPERT
This code is a lockup solenoid malfunction, also called the TCC. After car has shifted into high, at a designated speed, the lockup solenoid will engage, reducing RPM and saving gas. In your case it sounds like the lockup solenoid is not disengaging, causing the engine to stall, run rough. It is sort of like starting in second gear (on manual trans) from a start. You can try changing fluid again, but the final fix will be to replace solenoid. Shop around for a better price, but a malfunctioning solenoid will not fix itself.
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Saturday, April 18th, 2009 AT 5:51 AM
Tiny
KEN
  • ADMIN
Hello,

You will need to drop the pan which this guide will give you an idea on.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here is the wiring diagrams so you can see its the solenoid with the yellow wire is the one you want to replace.

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Monday, February 19th, 2018 AT 3:42 PM

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