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

CEL P203D Reductant Level sensor current high

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Old 12-23-2014, 02:44 PM
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2010 GL350
CEL P203D Reductant Level sensor current high

For my 2010 GL350 60k miles. Has anyone gotten this error? it was intermittance especially if I park my truck overnite it will go away when I start it will come back in about 30 mins later. I checked the adblue level was really low so poured in 2.5 gallons, still have room for more. Hope this was the issue... will find out soon.
Old 01-13-2015, 06:04 PM
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Yep, CEL is off for over two weeks now after I refilled the adblue.

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