Slow_55

Hello everyone. Today I took my e55 out for a drive in the rain. I was giving it throttle most the time and going sideways and having fun. Sometimes it’d go sideways and sometimes it would one wheel peel (open diff). When I sped up in one area the check engine light came on. I took it to a autozone because I didn’t have my scanner and I wasn’t near home either. They gave me the code P0730 as the main one and P0456. There were a bunch of other ones but they said all the other codes weren’t anything and that they’re always there. (Image attached of autozone codes) the guy there said it’s most likely my conductor plate which I didn’t take serious because they always say the most random bs. I was thinking it was something to do with my fuel system because I’ve been smelling gas the past two days ever since I filled up. But was also considering my conductor plate being bad since it was throwing a code. When I got home and used my own scanner the P0730 code was gone but the P0456 was still there. Now I’ll get the fuel thing figured out hopefully but I’m quite worried about the P0730 code. Could it have shown up because I was doing not so smart driving in the rain and the car was just confused? Or it’s an actual issue. This is my first German car and I’m not very familiar with them so any input would be appreciated. (Car has 126k miles)


They said everything after the P0456 code were all random codes that didn’t matter?


This is my scanner after I came home

nd-photo.nl

Do an adaptation reset for the gearbox and then drive it a little and scan it again

machild

And clear all the codes so you know exactly what comes up currently and not an old code.

cdk4219

And go get your fuel tank fixed, that’s the gas smell when filling up, or don’t fill up all of the way,

Slow_55

so if I fill up the tank 75% of the way I shouldn’t have this issue?

nd-photo.nl

I believe it has to do with this: https://mbworld.org/forums/w211-amg/...4-12-23-a.html

progonat

It's great that you're seeking advice about the issues you're experiencing with your E55. Let's break down the information and address your concerns:

1. Check Engine Light and Codes:
   
   • The P0730 code relates to the transmission. It typically indicates a problem with incorrect gear ratio, which can be caused by various transmission issues.
   • The P0456 code relates to the evaporative emission system, suggesting a small leak in the fuel vapor system.
2. Possible Causes:
   
   • The P0730 code may not be related to your rainy driving, but it's essential to investigate it further.
   • The P0456 code could be due to a loose gas cap or a minor leak in the fuel vapor system.
3. Concerns:
   
   • Driving aggressively in the rain could potentially strain various components of your vehicle, including the transmission. However, it's unlikely to be the sole cause of the P0730 code.
   • Ignoring the P0730 code could lead to further transmission issues if not addressed promptly.
4. Next Steps:
   
   • To diagnose the P0730 code, you should have a qualified mechanic or a specialized technician check your transmission for problems. It could be related to a faulty sensor, solenoid, or even the conductor plate as suggested.
   • Regarding the P0456 code, first, ensure your gas cap is tightened properly. If the issue persists, a mechanic should inspect the fuel vapor system for any leaks.

It''s advisable to have a professional inspect your car, especially for the P0730 code related to the transmission. Ignoring transmission issues can lead to more significant and costly problems down the road. Addressing the P0456 code is also essential to ensure your vehicle's emissions system is functioning correctly. Remember to drive responsibly to prevent further issues and ensure your safety on the road.

Pmarino

[QUOTE[color=#333333] I was thinking it was something to do with my fuel system because I’ve been smelling gas the past two days ever since I filled up.[/QUOTE]

Did you keep filling after the pumped clicked off.? Topping the tank to the very top?

Slow_55

Did you keep filling after the pumped clicked off.? Topping the tank to the very top?

Yes unfortunately I did I know it was not a very smart thing to do but I’ve always done it on my Japanese cars and I know your not supposed to but could this be the actual issue and my pump is still good? I just cleared the codes yesterday and when I drove today I got another code for p0446 which I believe is for the canister. Did I just ruin my canister or is this still related to overfilling. I did remove my rear seat and it was puddling on the drivers side. The gas tank is now at 75% and it hasn’t leaked I’ll check in the morning and clear the codes and take it on another drive.

[/QUOTE]

Pmarino

[/QUOTE]

The fuel pump cap (crack) leak is most likely the culprit for the P0456 code.(unless the hose is cut where the clamp is?) You'll need a new top for the pumps. Whether or not you spilled over into the charcoal canister during your spirited driving, is unknown at this point. R&R the leaking top of the fuel pumps, clear the code and see. Otherwise a smoke test can help narrow down the leak.

There was a recall on the purge valve and damper cage that may also be involved, a loose or cracked line, gas cap gasket, charcoal filter....etc, Start with what's known, don't start throwing parts at it.

MarieBreland

Thanks for explaining in brief, it helps me a lot.