2003 e320 code
#2
Out Of Control!!
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Without a VIN I am somewhat handicapped as I could not find an OBDII cross reference for P0123 with an E320 ME-SFI fuel injection system(2.8).
However P0442 relates to a minor leak in the fuel tank vapor purge system. Assuming you do not have a dash message regarding your filler cap, the fault concerns the purge control valve is leaking(not fuel), but fumes.
How old is your filler cap and does it close tightly----if it does than it's the valve
edit--I checked with the VIN---still no reference to an OBDII fault P0123---all other ok!!
However P0442 relates to a minor leak in the fuel tank vapor purge system. Assuming you do not have a dash message regarding your filler cap, the fault concerns the purge control valve is leaking(not fuel), but fumes.
How old is your filler cap and does it close tightly----if it does than it's the valve
edit--I checked with the VIN---still no reference to an OBDII fault P0123---all other ok!!
Last edited by Plutoe; 02-25-2013 at 06:57 PM.
#4
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2004 E320 4matic Sedan
P0123
Now what does that actually mean? It may mean you have a bad throttle position sensor (and it may not). If your code reader is more than just a simple reader, it may be able to show you the behavior of the TP. The thing to look for is a steady transition (%) in the TP as you press the throttle through its range with the engine running. Not a jerky change in the %. A smooth press of your foot should result in a smooth change in %.
As for symptoms, you could get transmission or other issues with a bad TP sensor. If you have no symptoms of that, perhaps you could clear the code and see if it returns.