P1647 Buick Engine Speed Signal Circuit Problem
Tech description
There are seven (7) codes listed on the service manual for the P1647 Buick code. Try reseting the code first, and if the code comes back, check fuses and the Engine Control Module (ECM) connector.
P1647 Buick Description
P1647 Buick – Power Command Signal Circuit Low Input
P1647 Buick – Power Command Signal Circuit High Input
P1647 Buick – Engine Torque Signal Circuit Low Input
P1647 Buick – Engine Torque Signal Circuit High Input
P1647 Buick – Mode Signal Circuit 1 Low Input
P1647 Buick – Mode Signal Circuit 1 High Input
P1647 Buick – Mode Signal Circuit 2 Problem
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