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Discussion Starter · #1 ·
Today I noticed this DTC. Any idea what is it?
 

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Check your email
 

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ECM-420D is an evaporative problem code, where the evap pressure fails to bleed off. It's not a clear-cut diagnosis, so I sent some details.
 

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Very old thread, but somebody asked about this recently so I'm attaching the (old) information. It's a pasted-up pdf.

View attachment ECM-420D.pdf
 
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