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Q:

what code p1660 mean 1998 oldsmobil aurora 4.0 on 1998 Oldsmobile Aurora

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my car gets hot and fans run only slow speed on high temp
(1) Answer
The DTC P1660 = "Cooling Fan Control Circuits"

I found that a technician replied to the same code on a 1998 Aurora. Follow this link to read his answer; http://repairpal.com/code-p1660-104

I hope this helps.