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Hey everyone. Just yesterday on my way home my car went into limp mode. Stuck in 2nd and C/S/M button won't work. Scanning it i only get 1 code. P2503. I restart the car and clear the code and the car goes from 1st to 2nd just fine. When I get to 3rd gear my scanner says the car is trying to select 3rd but the actual gear won't change into 3rd. I have had no Slipping from the transmission and am hoping this is merely an electrical fault.
I know conductor plates are very common to go bad in these cars. I have an 05 e55 with 194k miles. Im planning to buy a plate as soon as someone on here can confirm or at least suspect it is the plate. Im thinking of getting the assosiated solenoid for 2->3 shift as well. I clear the code and returns when it goes back into limp mode. Could really use some help or advice. I added a couple pictures of the trans warmed up and parked. Thanks
Hey everyone. Just yesterday on my way home my car went into limp mode. Stuck in 2nd and C/S/M button won't work. Scanning it i only get 1 code. P2503. I restart the car and clear the code and the car goes from 1st to 2nd just fine. When I get to 3rd gear my scanner says the car is trying to select 3rd but the actual gear won't change into 3rd. I have had no Slipping from the transmission and am hoping this is merely an electrical fault.
I know conductor plates are very common to go bad in these cars. I have an 05 e55 with 194k miles. Im planning to buy a plate as soon as someone on here can confirm or at least suspect it is the plate. Im thinking of getting the assosiated solenoid for 2->3 shift as well. I clear the code and returns when it goes back into limp mode. Could really use some help or advice. I added a couple pictures of the trans warmed up and parked. Thanks
Thanks for the kind words my friend..........
So that code is a generic low voltage code so did you pull that from Star or a generic scanner? I say you didn't use a Star system because it's impossible to have just that one code with a Star/Xentry system,there should be MORE codes for sure but who knows.
Start by looking at oil in the harness by the TCU and also unplug the connector at the trans, both real easy to do so look for oil in the wiring connector.The fact that the C,M,S button does not work kinda leans me that way.Also what about M mode,can you clear codes and get it to work? Conductor plate may be next after that but you don't want to start throwing darts right out of the gate.
Let me know from there.
Hello, yes I used a carsoft scanner. But I have xentry and can run the codes hopefully tomorrow. But I will check for oil contamination (although the plug was done a couple years ago). And I will order the plate and check the fluid while I do it. I will update with any additional codes when I can. Thank you
Yea the Xentry will pull more codes than the icar will and is more accurate. Also pull codes directly through the transmission menu on Xentry.
The conductor plate is easy a well but a little messy to do but gives you the chance to change the fluid and filter.
Yea the Xentry will pull more codes than the icar will and is more accurate. Also pull codes directly through the transmission menu on Xentry.
The conductor plate is easy a well but a little messy to do but gives you the chance to change the fluid and filter.
plugging in xentry i only got that same code as before, p2503. Dropping the pan i noticed very very find metal shavings on the magnet. But no chunks anywhere or anything. I swapped my conductor plate/filter and no luck. After getting to 2nd bucks and doesnt want to go into 3rd. I think the transmission is a goner. But if anyone has any suggestions im all ears. Again I scan with xentry to only get p2503. I clear and start to drive and goes back into limp mode. I think a manual swap may be in my future... tbd
So if the conductor plate did nothing and your TCU and wiring is good I am leaning to a solenoid issue that is causing a mismatch between gears. They normally do not go bad like that though but who knows with the miles you have on it.
Also for giggles if you have a spare TCU plug it in.
Here is a tip for any issue that throws codes wether engine or transmission. When you clear codes during a known problem the ECU will need to go through a small drive cycle so to speak and "see" and issue and than react to it. If you clear the code and the problem is instant than you have a "hard" fault so to speak,stuck solenoid for example or shorted-grounded wiring. If a clutch pack was damaged it would take longer,normally, for the ECU to analyze and react to it since it will have to go "out of bounds" within the ECU limits.
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