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  1. Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    My 2014 5.3L 4WD Tahoe has developed a nasty habit of throwing P015B and P015D codes, O2 sensor Delayed Response – Lean to Rich, for sensor 1 on both banks. It happens on the first deceleration from highway speed when the coolant temperature is above 80C (176F). “D” comes on more often than “B”...
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