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Re: Allison 2400
Posted to HD/Fleet Forum on 12/8/2012 4 Replies

Sherwin,

P0562 is "System Voltage Low". This code indicates a problem with the battery supply voltage to the TCM. Less than 9v on 12v system for 5seconds with engine running. It is the same for all GEN4 transmissions.

The 3K4K manual you have can be used t... Login to read more.

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