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trouble code issue on a w203 03 c240

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Old Oct 6, 2010 | 06:46 PM
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mbz03
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From: lowell,ma
W212 2010 Mercedes e350
trouble code issue on a w203 03 c240
hi guys i have a 2003 c240 rwd with 83,000 and the check engine light came up its a p0300 i never done any maintainance except change the oil any help or advise would be awesome...
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Old Oct 6, 2010 | 09:13 PM
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07 E63, 04 discovery
change your spark plugs
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Old Oct 6, 2010 | 09:14 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Do you
own a scanner?
If so clear the random misfire code and see if it comes back.
Could have been a simple miss that set the code
if returns then look at doing the plugs they are due.no multi tip
Change fuel filter
Change air filter
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Old Oct 6, 2010 | 10:20 PM
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From: lowell,ma
W212 2010 Mercedes e350
yes i have a scanner and 5 codes came up
p0451
p0301
p0304
p0303
p0300 this on relates to the p0301,p0304,and p0303
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Old Oct 6, 2010 | 10:22 PM
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From: lowell,ma
W212 2010 Mercedes e350
i just want to replace the right thing im pretty handy stealership charge to much money and sometimes u end up paying way to much and the problem sometimes dont go away..
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Old Oct 6, 2010 | 10:27 PM
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From: lowell,ma
W212 2010 Mercedes e350
ohlord what kind of plugs should i get
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Old Oct 7, 2010 | 09:12 AM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Bosch
7422
inspect all emission vac lines if you clear the codes and the p0451 returns
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Old Oct 11, 2010 | 07:47 PM
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From: lowell,ma
W212 2010 Mercedes e350
oh lord a change the plugs and 02 sensor but still have the codes running whats next
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Old Oct 12, 2010 | 10:44 AM
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03 E320 -wife's car now; 07 Porsche Boxster S - my toy
Originally Posted by mbz03
oh lord a change the plugs and 02 sensor but still have the codes running whats next
As ohlord recommended, check all the vacuum lines as the P0451 is an EVAP system code.

What codes do you still have?

Regards,
paul...
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Old Oct 16, 2010 | 06:48 AM
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mbz03
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From: lowell,ma
W212 2010 Mercedes e350
i change all the plugs but all the codes are still there
p0451
p0301
p0304
p0303
p0300
how can a check the vacuum lines and which ones or where can i find a manual to see which ones they are
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Old Oct 20, 2010 | 08:49 AM
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paulv
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From: Boston, MA USA
03 E320 -wife's car now; 07 Porsche Boxster S - my toy
Originally Posted by mbz03
i change all the plugs but all the codes are still there
p0451
p0301
p0304
p0303
p0300
how can a check the vacuum lines and which ones or where can i find a manual to see which ones they are
OK, the P0451 is the pressure sensor for the fuel tank, but tackle the other codes first. Go to Autozone and ask them if their scanner can provide freeze frame data. Freeze frame data is recorded when the CEL is set for most driveability codes. If so, get the values (they can be + or -) for the short term fuel trim (STFT) and long term fuel trim (LTFT) for both cylinder banks (e.g., LTFT1, STFT2, etc) and post them here.

If you can't resolve this problem, I know of two MB indies in the area you could go to (Wakefield and Peabody).

Regards,
paul...
Last edited by paulv; Oct 20, 2010 at 08:50 AM. Reason: added info
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Old Oct 22, 2010 | 07:10 PM
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hi there
where are u from?
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