Automatic Transmission issue (P0773)

mohsin-212 (Pakwheeler) 2020-01-25 17:36:35 +0500 #1

Assalam Alaikum
I am facing an issue with my Corolla Altis 2005 model it is not engaging TCC completely and on scanning I found this code : P0773

def3nder (PakWheeler) 2020-01-25 18:42:25 +0500 #2

What are some of the common causes of the code?

Causes for this P0773 transmission code may include:
Insufficient fluid level Dirty
contaminated fluid Dirty
clogged transmission filter
Defective transmission valve body
Restricted hydraulic passages
Transmission has internal failure
Faulty shift solenoid Corroded
damaged connector Faulty
damaged wiring Faulty PCM

What are some common repairs for this code?

Changing the fluid and filter Repair
replace a faulty shift solenoid Repair
replace defective transmission valve body
Repair or replace defective transmission
Transmission flush to clean passages
Cleaning corrosion from connectors
Repairing or replacing wiring Flashing or replacing PCM

Source: https://www.obd-codes.com/p0773

def3nder (PakWheeler) 2020-01-25 18:45:58 +0500 #3

I would say get checked your transmission fluid.

mohsin-212 (Pakwheeler) 2020-01-25 19:36:22 +0500 #4

Haan check krwa leta hun phr say. Waisay last month he Toyota walun ko dikhaya thaa aur local ustad ko bhee dikhaa chuka hun dono nay bola thaa theek hai Atf phr bhee dobara check krwa leta hun

mohsin-212 (Pakwheeler) 2020-01-26 12:42:46 +0500 #5

@capsat sir kindly guide me should I go for a repair or leave it as it is and if yes than any good place to repair this issue in Karachi and can I take the car by road to Karachi with this problem?? Any other fellow Pak Wheelers also kindly guide me if any one has any clue.

xenerking (xenerking) 2020-01-26 12:49:37 +0500 #6

why dont u contact Osama @syncview

mohsin-212 (Pakwheeler) 2020-01-26 15:20:30 +0500 #7

Yes sure anyone can tell I will be very grateful.

capsat (ومن شر حاسد إذا حسد) 2020-01-26 15:36:25 +0500 #8

@babarhyd can guide a workshop of his trust for such task, or handle it at a workshop in Hyderabad

mohsin-212 (Pakwheeler) 2020-01-26 15:47:11 +0500 #9

Actually I am in D.G Khan and I think there is no workshop which can repair Automatic transmission all are local ustads and I am reluctant to take it to them other than that there is Toyota D.G Khan Motors which are always ready to charge thousands of rupees

mohsin-212 (Pakwheeler) 2020-01-26 15:47:52 +0500 #10

But if they agree to repair then I will agree to pay them money

capsat (ومن شر حاسد إذا حسد) 2020-01-26 15:50:31 +0500 #11

call up 0321 4106898 @syncview in law_hore set up a time as in doctors appointment drive there. he will help to resolve the issue. DG Khan i agree is bit behind technically to handle fault diagnosis maintenance of COMPUTER driven cars

mohsin-212 (Pakwheeler) 2020-01-26 15:53:34 +0500 #12

Is it safe to drive it to lahore with this error

capsat (ومن شر حاسد إذا حسد) 2020-01-26 15:55:07 +0500 #13

yes it would be bit heavy on fuel but will raise no issues @babarhyd @ser_gtr @syncview @Xulfiqar @VCheng

mohsin-212 (Pakwheeler) 2020-01-26 15:58:53 +0500 #14

Actually I had a plan to travel to Karachi on this car next Sunday but all of a sudden came across with this now If I travel for long without TCC lockup it might heatup the transmission as per internet

capsat (ومن شر حاسد إذا حسد) 2020-01-26 16:01:58 +0500 #15

what is the odometer reading and when was the ATF changed ? am sorry i missed asking the basic questions. @def3nder thank you point to basic

mohsin-212 (Pakwheeler) 2020-01-26 16:08:12 +0500 #16

Odometer reading is around 109000 and I purchased the car back in 2018 at odo reading of 101000 . I took the car to Toyota as well as 2-3 ustaads all of them said its perfectly fine and no burning smell so no need to change.

capsat (ومن شر حاسد إذا حسد) 2020-01-26 16:12:09 +0500 #17

check the trans-axle code on vehicle id plate in engine bay or the trunk, use google to know which type of atf it takes change it immediately. ask mechanic to remove the transmission sump remove the filter and clean it with acetone / petrol . get oem new transmission filter & replace if available.

pour in new fresh fluid
correct me for transmission type in your car. i reckon it is U-340E, i may be wrong.

mohsin-212 (Pakwheeler) 2020-01-26 16:19:26 +0500 #18

Yes you are correct its U341E but its filter is not available anywhere even in Karachi I searched in some big markets like Plaza. But suppose if problem not goes than new ATF will be a total loss what you say?? So is it not better to first flush the solenoid which is making trouble???

capsat (ومن شر حاسد إذا حسد) 2020-01-26 16:21:06 +0500 #19

in any case you need fluid change and filter cleaning. it is over due since 80,000 kms. unless you believe every thing in a car is life time. normally people only wash clean the filter due to its exorbitant price i.e PKRs 7000+

def3nder (PakWheeler) 2020-01-26 16:24:29 +0500 #20

WOW mashALLAH 109K ODO is like a new car

@capsat You welcome big brother. So far according to the MOhsin bhai transmission oil color is pinkish and has the right level of oil in the transmission as well. Sadly, We dont have any new transmission filter or gasket available in the market of this model corolla

@mohsin-212 I hope you visit today to some workshop or guy to check this issue. And please first make sure your TCC is locking up or not. Share a video of your speedometer while driving and cruising at 80km/hr for atlest 40 to 60 second video.