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International Automotive Technicians Network
Re: p1291
Posted to HD/Fleet Forum on 12/3/2020

P1291 is a short to power or ground on "bank 1" injector circuits. Keep in mind, bank 1 does not refer to the actual right bank of the engine, but to the control circuit for injectors 1, 4, 6 and 7, so the issue could be on either side of the engine. Unlike th... Login to read more.