Trouble code P0757
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Launching!
Joined: Jan 2007
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From: Honolulu
Trouble code P0757 I got this code from my scanner today on my A4 4L60 that's been built to lvl2.
The scanner was reading and displayed the code then Shift Solenoid B stuck on. What does this mean and how do I fix it and what damage is it going to do? I normally drive in OD, but today I put it into D and hit about 50-55 before putting in OD on the freeway, in traffic back to D and past 45mph back to OD again. About 25 minutes later driving around in OD for a few miles the SES light came on.
The scanner was reading and displayed the code then Shift Solenoid B stuck on. What does this mean and how do I fix it and what damage is it going to do? I normally drive in OD, but today I put it into D and hit about 50-55 before putting in OD on the freeway, in traffic back to D and past 45mph back to OD again. About 25 minutes later driving around in OD for a few miles the SES light came on.
I doubt its hurting any thing damage wise but there are three possibilites.
1- the 2-3 or called shift solenoid B is bad replace is easy
2-valve body shift valve stuck ussually this will result in no third gear though
3- Likley if PCM has not been programed and stall is on the loose side that the code is eronious code caused by the high stall converter, The PCM comands 3rd gear then compares engine RPM to VSS and does not see the expected ratio and assumes the 2-3 shift did not take place though it actually did , This would be a tuning issue and is the most likley culprit
1- the 2-3 or called shift solenoid B is bad replace is easy
2-valve body shift valve stuck ussually this will result in no third gear though
3- Likley if PCM has not been programed and stall is on the loose side that the code is eronious code caused by the high stall converter, The PCM comands 3rd gear then compares engine RPM to VSS and does not see the expected ratio and assumes the 2-3 shift did not take place though it actually did , This would be a tuning issue and is the most likley culprit
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Thread Starter
Launching!
Joined: Jan 2007
Posts: 283
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From: Honolulu
I do have 3rd gear still, the tune is set to stock, and the stall is on the loose side for now. It's a Fuddle 3400. Since the tune was reset to stock on the engine (unsure of the trans tune) I have noticed greatly increased firmness in the shifts, at times the car lurches pretty badly.
You have a tuning issue I am very sure
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Thread Starter
Launching!
Joined: Jan 2007
Posts: 283
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From: Honolulu
Thanks for your help, I'll get it tuned soon, I'm tired of the car jumping with a hard lurch every shift. Can't be good for the driveshaft, and other drivetrain components. I did some driving around this afternoon and put some miles and speed on it, the SES light is no longer on.
You might need to delete that code because of your stall torque converter. I have seen it happen in the past and if the trans works well, the solenoid is new, try deleting the code. I would probably drop the pan before doing anything to make sure that the pan is not full of debris and go from there. As far as the hard shifts it would depend on how the unit is set up pressure wise and how the accumulation is set up. Also if the tune for the transmission has been modified with elevated line pressure I would return the pressure tables back to stock. The reason I'm saying this is because more than likely your transmission has a shift kit installed. With the shift kit the pressure has already been elevated and with the tune, it's probably way to much. Might want to contact your builder and tuner to discuss these issues. Good luck. Vince
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3- Likley if PCM has not been programed and stall is on the loose side that the code is eronious code caused by the high stall converter, The PCM comands 3rd gear then compares engine RPM to VSS and does not see the expected ratio and assumes the 2-3 shift did not take place though it actually did , This would be a tuning issue and is the most likley culprit
Thanks.
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Originally Posted by Fast GTO
So how do you go about fixing this? I am having the same issue, I have 3rd gear but when this code pops up my converter won't lock up. I was told that the transmission is going into safe mode even though I might not actually have a problem.
Thanks.
Thanks.
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its easy to do if you have tuning software or have your tuner do it. I shut my p0757 off after I threw that code a couple times with a FLT tranny and 3600 always exiting off the highway on a long uphill off ramp where it would hold 3rd gear at a higher rpm for a time. on my car with HTP its just a simple find the code and uncheck the box and flash the new tune.
From what i have read that is all there is to it
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My SES light came on today, and it was this same code(p0757) as well, is it really just a tuning thing? Can the code be deleted and all will be well? I did notice though once I saw the SES light, it took a lot of RPM's to get the car moving from the stop sign.
The code can set due to a tuning issue wit large cams but it can also set for a real fault , The extra RPM from a stop sounds like limp mode. You could also have a bad shift solenoid particularly if you have a stock converter
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Originally Posted by performabuilt
The code can set due to a tuning issue wit large cams but it can also set for a real fault , The extra RPM from a stop sounds like limp mode. You could also have a bad shift solenoid particularly if you have a stock converter
