GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Replaced fuel cap. Still "Fuel Filler Cap Open" and CEL

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Old 04-06-2020 | 09:55 AM
  #1  
Isentropic's Avatar
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2001 ML320 (gave to family member), 2007 GL450
Replaced fuel cap. Still "Fuel Filler Cap Open" and CEL

Would greatly appreciate the help. This has been going on for ~2yrs.
The red gas cap light and CEL comes on when idle for more than 1 min. at stop light.

I bought a brand new gas cap but still getting the same problems.
Pulled codes: P0455, P0172

Would greatly appreciate any help.
Old 04-06-2020 | 10:25 AM
  #2  
Miguk_Saram's Avatar
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From: Germantown, MD
'07 GL450
Refer to post #4 of the following thread:

P0456

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