I have a code of U1064

2003 CHEVROLET IMPALA
92,000 MILES
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FAW484
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I have a code of U1064 ( Loss of Communication) Can you tell me what exactually this means. And how to fix it? I ve read that alot of BCM,s have been replaced needlessly. My security light is on. And also I have a code of B3128 and my door lock fuse keeps blowing.
Mar 22, 2012 at 2:47 PM
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WRENCHTECH
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The U1064 indicates a communication error between the BCM and the PCM which would have to be investigated further.

The B3128 is a problem in the door lock circuit somewhere

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to voltage on the door lock actuator lock control circuit, door lock actuator unlock control circuit or driver door lock actuator unlock control circuit for greater than 150 milliseconds .
Mar 22, 2012 at 3:35 PM
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FIXITMR
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check the connector plug seems to be a common issue.
Mar 22, 2012 at 3:45 PM
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