P0420 Engine Code 2014 Chevy Equinox

Oxygen bank heater o2 p0141 p0420 p0138 catalyst voltage malfunction system threshold downstream efficiency carparts gasoline p0135 dtc P0420 code: catalyst system efficiency below threshold (bank 1)

P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In

P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In

P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In

P0420 Code: Catalyst System Efficiency Below Threshold (Bank 1) - In

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