Dr. Q

A few weeks ago, the CEL was turned on w/ the error code P0455..
so I asked one of my friends about it..
then he told me to check the gas cap and make sure it is tight and closed..
so I did that, then it went away..

HOWEVER!!!!!!!!!!!!!!!!!!
2 days ago.. it happened again..
then it doesn't go away so far!!

I can go to the dealershop but.. the only thing i worry about is..
if they need to reflash my ECU!!! since i got ecu tuned by kleemann..

You guys have any idea what I should do?! ;(
It feels so uncomfortable when my car runs w/ CEL on it..
even though it's not that serious prbm!!

PLEASE!!!!!!!!!!!!!!!!! Make me happy guys!!

GBlansten

http://www.obd-codes.com/p0455

Could be the purge valve.

https://mbworld.org/forums/c63-amg-w...lve-issue.html

Dr. Q

THANK YOU soooooooooooooooooooooooo much!!

drawde

I had a CEL when I first got my car and it was due to the gas cap.. It wasn't just loose, something was wrong with it and the dealer replaced it.

Dr. Q

so!!!!!!
even tho I bring my car to the dealershop!!
they are not gonna reflash the ECU?!

whenever I go to dealershop, Im kinda scare of they are gonna reflash the ECU w/o asking -_-;; haha..

C63newdude

I'll be honest with you. You seems to be worry enough just like I would but I think that you should send your ECU to get it flash back to stock then take it to the dealer and have the daler flash it to stock.

I have had messages on my dash ater reilling my gas tank beyond its recommended capacity but it was never a CEL, it was just a simple mesaage on the dash board.

drawde

Take it to the dealer.. I doubt they'll reflash it. If you're going to send it back, flash to stock, then when the dealer's done, send it back to get it flashed again.. You might as well let the dealer flash it back, then send it in to get reflashed which would be only 1 trip instead of 2.

I don't believe they flash the ECU all ***** nilly like that, I would think they would go other routes (gas cap, purge valve, etc) and reflash probably as a last resort if nothing else works and they still can't figure it out..

Case1906

Dr. Q -how did you make out with this?

I recently had a CEL with a simultaneous gas cap loose warning. The cap did not seem loose when I checked it. After tightening, I no longer had a gas cap warning but the the CLE stayed on.

The code was P0455 which I cleared. So far so good, but we'll see if CEL returns.

Note- I took HHughes' advice from another thread and bought a OBD-II reader from Advance Auto. I selected an Actron CP9575 which, unfortunately, would not work with my C63. I keep getting a "Link Error" read. I downloaded the latest software, but still could not get it to work. Their 800 tech line did not ring. I tried the Advance loaner--a CP9580 (high end model)--and it did not work either, again Link Error. The Advance guys had no explanation, other than telling me to check the car's diagnostic fuse (which was OK). The CP9575 worked fine with my E350 and MDX. Frustrating, but I returned it to Advance with no problems. Earlier in the day I borrowed an Actron Pocket Span Plus (less expensive) loaner from Pep Boys and (surprise, surprise) it worked fine on the C63. It linked, read the code and deleted the CEL with no problem.

I'll buy another reader as soon as the next CEL comes my way.....

Sincity

Please give us the details on the next reader you buy that works. Tks.

Dr. Q

I just went the dealer shop and said not to reflash my ecu..
then.. they were like.. "we don't even need to reflash ur ecu.."
and they just switch the purge valve for free..
then the CEL is gone

khmergod

Lol, Funny updated post. Always keep me smiling with your posts Doc!

Dr. Q

Why? ;(
Cuz of my poor english? Don't make me sad!! Hehe~

Im getting out of work!! Yay~
Have u guys thought how i feel when i stay whole night at ER on Independence day!!
But im done!! Hahahahaha!! Heading home and swimimg on my bed w/ my pillow;;

hhughes1

This is the one that I use.

http://www.harborfreight.com/obd-ii-...ner-99722.html

Sincity

^ Thanks HH. They are local and I'll look for that 20% discount coupon.

Case1906

Good call, thanks. Should have just copped what you were using. It's clear that Actron models are not the way to go for C63's. Hit and miss. One of 3 models read my car. With a search, I now see that others have had the same problems.

Case1906

Dr. Q--thanks for the update, glad things worked out and that you saved your tune.

I'm sure your last few patients weren't real happy about you doing an all-nighter, and that swimming with the pillow thing sounds dangerous...

Sincity

Has anyone tried the OT-2 from Innovate Motorsports?

JeffDL

just went through the exact same thing. dealer could not find anything wrong even though cel was on with 0455 code. They asked me twice if I filled up the car while it was running. Purge valve replaced no more cel. Kleemann K1 still intact.

PistolWhipC63

Anybody notice raw gas smell on start up with people that had the purge valve problem?

Sincity

Innovate confirmed not compatible.

JeffDL

no. my car seemed 100% normal. but that is supposed to be a symptom.

bluejae

i was looking into this too... do you happen to know why it's not compatible? the company has mercedes on their list and i've seen posts about some 55 users having success with it... is it just something with the 63?

Sincity

HH: Just picked this up. Have you figured out where to get the update files?

Gezim313

Hey guys so I’m tuned with EC and I have the burble tune on but I have the same code p0455 and I changed purge valve was good for abou 3-4 days then no CEL but they turned off then the pop up “GAS CAP LOOSE” came on that gave me a CEL so I changed that too and my burbles are still off however EC told me that if there a pending CEL it will turn them off so idk what to do because it’s always the same code

“P0455”

spio017

Hello fellow W204 C63 AMG Owners,

I personally had this P0455 issue right after I replaced my leaky fuel filter that was identical to this issue. https://mbworld.org/forums/c63-amg-w...it-filter.html

I had tried an aftermarket purge valve and gas cap before I discovered a video from an E55 on youtube with the same problem. He replaced his shut-off valve and purge valve which did the trick. So I did the same and have been CEL free now for 2 weeks. I also replaced the aftermarket purge valve (the solenoid was incredibly loud) with the OEM part from a dealership. The original shut-off valve attached to the vapor canister was in terrible condition and literally fell apart in my hands after taking it out. So if you're desperate to try something, please check these out! The vapor canister is behind the fabric of the wheel well the passenger side (US) right rear wheel and you don't even need to take the whole thing out, not a hard job, just a dirty one.

FYI - if you buy the whole vapor canister it should come with a shut-off valve included

203-470-06-59-64 - Vapor Canister (might be easier to find compared to just the shut-off valve)
001-470-13-93 - Shut-off Valve
000-470-88-93 - Purge Valve Solenoid