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U2004 Diagnostic Trouble Code Discussion for June 2007

spi data-out low

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Trouble Ticket Help Requests for DTC U2004
Help Request Posted
1999 Chevrolet Malibu LS 3.1L No Start, Stall, MIL Lamp on VIN: 1G1NE52M8X
U2004: spi data-out low. ... Checked codes, found P1626 and U1016. Checked battery connections, tested power and grounds at computer and checked connector-ok. Replaced computer per Alldata flow chart. Vehicle seemed fixed. Came back about 2 weeks later with same symptom. Rechecked wor...
June 22, 2007