Cadillac STS P Codes (Powertrain) P1600 - P1699 P1660

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DTC Codes

CADILLAC STS
I Have Several Dtc Codes (1997 Sts) P0404, P0420, P0741, And P1660 How Do I Trouble Shoot These Codes And What Do I Need To Do To...
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P1660

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