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Thread: P0690 Code help
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04-09-2020 #1
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- Join Date
- Jul 2017
- Location
- Nashville, TN
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P0690 Code help
So dialing in all of the gremlins on my 1978 firebird LS3 swap. All seems to be working well excpet that I am getting a P0690 ECM Power Relay High code. I looked at ECM fuse and it is good visually inspected the harness, as much as I could and all looks good. The car seems to start and run well. Any suggestions where to start on this? Common swap issues related etc? Thanks in advance.
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