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2010 Toyota Corolla TCC Solenoid Saga

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Sep 7, 2014, 2:11 PM

Post #1 of 2 (1090 views)
2010 Toyota Corolla TCC Solenoid Saga Sign In

I have a 2010 Toyota Corolla LE (1.8L 4cyl 4A) with 117,214 Miles on it.

A year and a half a go my Torque Converter had a catastrophic malfunction and spewed it's innards into the gear box and this led to me having the transmission rebuilt completely. The guy who I brought it to took about 6 weeks to diagnose it, get the right parts and finally rebuild the thing. He almost never answered the phone and would never call me, I always had to call him. I was understanding about the parts because I figured it was not really his fault as he said he ordered the right parts but they sent him the wrong ones. Whatever, might have been BS or might have been legitimate. At the time it wasn't a huge deal as I didn't need the car for that time.

Flash forward a few months ago and we get this error code
"P2757 Solenoid press ctrl sol ctrl ckt perf / stuck off"

I look it up and it's really hard to find out what exactly it is. The car seemed to be shifting fine and no issues I could feel.

I bring the car in to the same guy. I figure he might have a better idea since he was the last one to work on it and maybe he'll cut me a break even though the parts are already out of warranty.

Turns out this guys is just a flake all around. It takes him a full week before he decides he needs to look at the Solenoid out and test it. So after testing the part he informs me that it isn't working. I then tell him to just replace it and again I discover that he's received the wrong parts and less than quick to respond to my phone calls. The right part is going to cost another 100 dollars. In the end he finds the right part, replaces it and 3 weeks after dropping it off I can pick up my car. It costs 750 dollars all together. That's after He took 10% off for the trouble delay, so I wasn't as pissed about it, but still pissed because it was 50 dollars more than the original quote and took 3 times as long.

The next day I go to pick the car up and we drive 4 miles down the road and once we go above about 40-45 the light comes back on just like before. Engine light on and the Traction control light blinking

I drive the car straight to auto-zone and read the code. Sure enough it's the same code as before "p2757 TCC Solenoid press ctrl sol ctrl ckt perf / stuck off"

So I guess I have a couple questions here.

1) Should I bother bringing my car back to the same mechanic? I really don't want to have the car in the shop for another 3 weeks or more when another shop might get it done faster and do it right. At the same time I don't know if I can get a refund from him because work was actually done and a part was replaced. Am I entitled to ask for my money back or a portion of my money back?

2) What could be causing this problem? If the Solenoid was replaced is there something else that could be causing this code?

Ultimate Carjunky / Moderator
Discretesignals profile image

Sep 7, 2014, 2:38 PM

Post #2 of 2 (1082 views)
Re: 2010 Toyota Corolla TCC Solenoid Saga Sign In

Is this guy moonlighting or working on his own? Is this a licensed and insured repair shop that your taking it to? Does this shop specialize in domestic and asian transmissions? Is he getting his parts through the dealer or aftermarket? Technically that would be considered a comeback and he or the shop should be liable to re-troubleshoot the problem for free. Depending on what is found wrong would determine if you pay parts and labor.

Basically, in a nutshell, the ECM is monitoring various sensors to determine if lock up of the torque converter clutch (TCC) has occurred when commanded and torque converter lock up is not happening when not being commanded. If the ECM doesn't see torque converter engagement when it is commanded or does see torque converter engagement when it isn't being commanded, is when that code sets. Just because it has solenoid in the description does not necessarily mean the solenoid is the culprit. Anything from sticking valves, faulty converter clutch apply components, TCC hydraulic circuit problems, or any of number or things that affects the TCC system could cause that code to pop up.

An experienced transmission tech with the proper equipment, resources, and knowledge of the system should be able to narrow the problem down. Goober in his back yard garage with tacklebox of tools that used to work on domestic transmissions back in the 70's and hasn't been updated since then, probably won't be able to diagnose and properly repair these newer computer controlled transmissions.

The most important thing when repairing transmission issues it to determine the cause and the effect. If you had a torn up TCC that grenaded the transmission, why did that happen? If the cause isn't found and you only repair the effect, your going to be back to the same ole problem.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Sep 7, 2014, 2:40 PM)

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