P0770 - Urgent Help Needed!!!
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P0770 - Urgent Help Needed!!!
Hey guys, I have a 95 LS400 that I just bought and it is a dream. However, I am having some issues and I need your advice. It throwing a code of P0770 which means shift solenoid and my Lex Technician told me that it is a possibility that the solenoid could take care the problem or just ultimately be indicating a rebuild. The car shifts great however in the mornings when the car is still cold I presume, when I slow down it seems the the car vibrates greatly from the drivetrain and then when I take off after that vibration it seem the car stutters or hesitates . Yet, it will only do this in the morning usually and will not happen through out the day. My question is can a bad ecu cause a code like that? The reason why I suspect the ecu is because supposedly the former owner had a used transmission put in prior to me buying the car? Theoretically how long can a ride with this code and does it do any further damage to the car? Should I replace the solenoid or start saving up for another transmission or perhaps another car? Thanks guys for your input and advice I really need help.
Last edited by RA40; 06-21-14 at 01:25 AM. Reason: descriptive title
#2
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Welcome to Club Lexus.
Additional info needed: how many miles on car?
The P0770 is obvious. What condition is the tranny fluid? I hope it has Toyota Type IV or compatible. The wrong fluid or improper fill levels is a big cause of transmission issues.
Bushing wear can also attributable to vibrations. Carrier bushings, tranny mount and engine mounts.
Additional info needed: how many miles on car?
The P0770 is obvious. What condition is the tranny fluid? I hope it has Toyota Type IV or compatible. The wrong fluid or improper fill levels is a big cause of transmission issues.
Bushing wear can also attributable to vibrations. Carrier bushings, tranny mount and engine mounts.
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Welcome to Club Lexus.
Additional info needed: how many miles on car?
The P0770 is obvious. What condition is the tranny fluid? I hope it has Toyota Type IV or compatible. The wrong fluid or improper fill levels is a big cause of transmission issues.
Bushing wear can also attributable to vibrations. Carrier bushings, tranny mount and engine mounts.
Additional info needed: how many miles on car?
The P0770 is obvious. What condition is the tranny fluid? I hope it has Toyota Type IV or compatible. The wrong fluid or improper fill levels is a big cause of transmission issues.
Bushing wear can also attributable to vibrations. Carrier bushings, tranny mount and engine mounts.
#4
Lexus Champion
My question is can a bad ecu cause a code like that?
on my '96, my ECU got so bad the car would not even automatically shift AT ALL - but it had the misleading symptom of solenoids, because I could still shift it just fine manually!
The ECU caps were bad, now it shifts perfectly and no codes!
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YES!!
on my '96, my ECU got so bad the car would not even automatically shift AT ALL - but it had the misleading symptom of solenoids, because I could still shift it just fine manually!
The ECU caps were bad, now it shifts perfectly and no codes!
on my '96, my ECU got so bad the car would not even automatically shift AT ALL - but it had the misleading symptom of solenoids, because I could still shift it just fine manually!
The ECU caps were bad, now it shifts perfectly and no codes!
#6
Lexus Champion
I replaced the capacitors myself, my thread on this tells the values you need and what type of capacitors to order (low ESR type, 105C temp rating, and brand should be Rubycon or Nippon Chemicon, or Panasonic, or Nichicon) and even gives step by step instructions on the repair in post #11
Attachment 501425Attachment 501695Attachment 501426Attachment 501695Attachment 501428Attachment 501695Attachment 501429
a junkyard ECU would have the same problem
the cost of all the capacitors to my door was less than $16
you can do this yourself if you are good at soldering!
the thing is, even if this is not the problem, it *will* be a problem soon, all Lexus's from the 90's have this issue, it is a ticking time bomb, so fix it regardless!
Attachment 501425Attachment 501695Attachment 501426Attachment 501695Attachment 501428Attachment 501695Attachment 501429
a junkyard ECU would have the same problem
the cost of all the capacitors to my door was less than $16
you can do this yourself if you are good at soldering!
the thing is, even if this is not the problem, it *will* be a problem soon, all Lexus's from the 90's have this issue, it is a ticking time bomb, so fix it regardless!
Last edited by LScowboyLS; 10-11-12 at 06:16 PM.
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#8
No reprogramming is required after the capacitor replacement,just make sure whoever does the job is competent at soldering and handling printed circuit boards.
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