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International Automotive Technicians Network
Re: Code P0420
Posted to Technical Discussion Forum on 9/10/2012

[...trimmed text...]

This is what I get using the G-SCAN.

Normal operation [2009 Subaru Forester X, ECM/Inputs/Outputs Scan Data]

Forcing lean. Notice the AFR current compared to the normal scan data. [2009 Subaru Fo... Login to read more.

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