I think you'd want something like this...

access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any source-quench
access-list 101 permit icmp any any unreachable
access-list 101 permit icmp any any time-exceeded
access-group 101 in interface outside
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Oliver mk1 30gb: 129 | mk2a 30gb: 040104126