E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

Flashing gas light followed by check engine electronics

Old Sep 15, 2009 | 06:04 PM
  #1  
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Rat
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From: Texas
1997 E420
Flashing gas light followed by check engine electronics

I got the code at autozone: P0455

From what I read here, first thing to do is to change the gas cap, right? But then if I do that, and it fixes my problem, will the 'check engine' light go away by itself? If so, how long would it take?

what else could cause this error? I did nothing special lately with the car, we just had a lot of rain and its very humid (not so common here)
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Old Sep 15, 2009 | 08:19 PM
  #2  
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Large leak evap system

Usually just make sure the gas cap is on properly or gently pry the gasket out of the cap and flip it over to a good side.Then put it back on properly. When the ecu checks the emissions system again the light will clear itself if the problem is fixed.If not purchase a new cap from the dealer or autohausaz.com generic auto parts store caps are poor substitutes to the oem cap.
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Old Sep 15, 2009 | 09:26 PM
  #3  
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1997 E420
thanks, I just flipped the gasket over, if the light is to clear itself, how long would it typically take?
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Old Oct 29, 2009 | 06:00 PM
  #4  
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E420
I used regular gas and had the same problem, I switch to premium with one gas treatment and my problem was solved after a few miles.
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Old Oct 30, 2009 | 09:59 PM
  #5  
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1997 E420
update: it was not the gas cap. got a new one, no effect. BUT my problem went away by itself.
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Old Oct 31, 2009 | 12:23 AM
  #6  
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
It went away

because you got the new cap. Once the system went through enough clear drive cycles it cleared the code and the pending codes. That is the way the system is designed.
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