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Discussion Starter #1
I was accelerating on a slight uphill and experienced:

(1) sudden loss of power: car failed to accelerate for a split second.
(2) some (not sure if all) dash lights came on and off once.
(3) CEL on, code p0685 (ECM malfunction?)

No problems after that (only 20-30 miles ago), code was cleared to see if it happens again. Recent work: replaced the battery about 1.5 months ago and had an electrical system check at the same time at auto store. The starter amp draw was low with ok voltage.

Only found this thread and it suggests to check the battery and/or alternator.


Any other ideas? Thanks.
 

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Check battery terminals, grab one and try to twist it. If it moves, get a battery terminal shim at a auto parts store.
If both do not move, another issue is present that we'd need to explore
 

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Did anyone resolve there P0685 issues? if so what was to root cause?
 
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