P0752 code

Bought a 2015 buick verano.
Car shifts when cold,gets stuck on gear one when hot.
Got p0752 code. Solenoid 1 stuck on.
Anybody knows how can i repair it myself?

You could change the transmission fluid and see if that cures it. The cheap reason for the code is low trans fluid level or dirty fluid. If that doesn’t work you need a transmission shop to evaluate it and find out why the solenoid valve isn’t functioning properly.

How good are you with mechanical repairs and transmission valve body’s??

These transmissions often have complaints of soft or flare up on shifts, burned friction plates, TCC slip as well as various solenoids and gear ratio codes.

These complaints are often the result of wear at the actuator feed limit (AFL) valve. The purpose of the AFL valve is to limit the pressure going to the solenoids. The AFL valve spring is calibrated to prevent the solenoid feed pressure from exceeding a predetermined PSI, no matter what main line pressure is. This is necessary to prevent more fluid from being fed to the solenoids than they can effectively regulate and limit what max line pressure output is. If the pressure feeding the solenoids is too high or too low, their output will also be too high or too low. As a result, shift quality complaints and codes can occur along with low or high main line pressure.

The other source of these complaints is at the spring end of the pressure regulator valve. This is the EPC boost area of the valve. When bore or valve wear occurs here, it causes a loss of EPC boost signal oil. The end result is lazy or low-pressure boost response, low line pressure, clutch slippage, solenoid performance and gear ratio codes. Lastly, the TCC regulator valve bore wears out causing the TCC slip problems and codes.

You can do a valve body repair kit (if this is your problem), but internal damage could have already happened…

Check your fluid level and possibly drain and fill, but looks like the filter is deep internal, 11.8 hours labor and 8.6 hours of that is just to R&R the transaxle…
So probably a good idea to take it to a good transmission shop or dealer…


I don’t. But such a thing might be possible. From what I see the TCM (trans control module) issues commands that electrically actuates that solenoid. When it works correctly, it directs trans fluid to the correct places inside the transmission to create the forces needed to effect the gear shifts, clutch activations and releases and the like. Solenoid-wise, besides the electro-magnet, there’s a plunger and a spring, and a valve seat, any of which could be involved. I think your best bet is to hire a trans shop to diagnose the problem for you. They’ll run it through some circuit/system tests, measure fluid pressures at various places, from that will likely be able to tell you what needs fixing or replacing. If that particular solenoid that has failed — if that’s the problem – it is probably part of a solenoid ass’y, and the entire ass’y would have to be replaced, not just the failed solenoid. It could just be some debris/dirt is blocking one of the fluid paths. For that you’d probably have to remove the valve body and thoroughly clean it. Not sure if that can be done with transmission still installed. Even if it can be done without removing transmission, this is a very complicated procedure, not for the faint of heart diy’er.

If you want to try something, anything, yourself first, before taking it to trans shop, replacing the trans fluid with fresh stuff, and trans filter too if designed to be easily replaced. Then make sure trans fluid is correct level. If that helps but doesn’t 100% solve problem drive a hundred miles, then do it again, might get lucky.