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International Automotive Technicians Network
Re: P0641 VREF 1 low
Posted to Technical Theory Forum on 8/1/2018

Ah yes, the SI definition does refer to an open, but that is misleading. The definition can also mean, anything that causes the VREF to 'disappear'. It is very similar to the Volkswagen/Audi definition, that says voltage disappears, when in actuality, it can b... Login to read more.