MB Enthusiast

Help

Flashing gas light and CEL - Check engine electronics - Code P0455

Last time I saw this issue it was the ingintion coil but there were additional codes

Can someone help me translate this code ? I think it is a fuel leak issue

I tried first putting on a new gas cap but the code came back

I am in florida and we have had massive rain issues

I don't know if this is having an effect on the engine - the car is not garaged

Air Marshall Eldritch

Usually it is caused by a loose gas cap, but you already checked that. The next possibility is a small leak in your fuel line which is tough to diagnose without having a shop do a smoke test.

ohlord

you gassed up the last time ,did you top the fuel tank up?

MB Enthusiast

No I never to off tank

What else could it be

I have to take a long drive this weekend and i don't want to get stuck

ohlord

line has come loose or frayed,or your charcoal canister is disconnected,or someplace there is a large leak in the emissions system.Did you install a new cap and gasket purchased at the Mercedes dealer?Do not buy gas caps from a local auto store for the w210.
If a good cap does not fix the issue,you will need to inspect all of the above.lines,fittings,canister,fuel line fittings to the fuel pump,lines to the purge valve,etc.
if a new mb cap does not cure it,and you can't locate it by inspection,then get out the smoke machine
ohlord

Franasia

I'm almost positive it's the purge valve. Very easy and economical solution. I had the same situation for about two years and I kept replacing gas caps and resetting codes until ohlord came to the rescue:

http://www.benzworld.org/forums/w210...rge-valve.html

You forgot!

MB Enthusiast

Can you send me the PDF some other way it is not allowing my user name and password to download or open

ohlord

cleaning.Locate purge valve on drivers side inner wheel well in front of the brake master ,little black can shaped object with some line and wires,labeled MOT.Pull off the vacuum hoses gently and spray some crc brand maf cleaner into each hose and into the mot inlets themselves.Wait about 10-15 minutes to air out and evaporate and push the hoses back on again.Start the car.clear the code if you have a scanner.You can test the purge valve at any time by just pulling off the rear vac line going into it and you should hear it tapping away like a little drummer.This lets you know it is working.Because it is only on when tested at start up and when fuel fumes build up and need to be purged,hence the name
ohlord

MB Enthusiast

I found CRC throttle and air intake cleaner is this what you refered to as MAF Cleaner?

Advanced Autoparts does not have it

Where can I buy it

Thanks

ohlord

kraggens labeled maf cleaner ,has no residue left over that many throttle cleaners contain.

MB Enthusiast

Where can I find cleaner ?

I can't find it online

okc329

WD40 in each side of purge valve.

onefeargod

hello, I'm a new slk230 owner, flashing fuel light crazy, check all hose, engine compartment and rear fuel area, finally found the o-ring twisted int he intercooler tube next to the intake hot wire. drove 100 mile there and 100 miles back the light came back on with a 0455 code when I pulled back in drive way and sat there idling for about 30 seconds beginning to clebrated but the light turned on. I cleared the code and went to bed. the 200 mile trip is the longest the fuel light stayed out and no check engine light

onefeargod

oh lord, please read by thread (onefeargod) newbie any suggestions keeping me up all night