P1647 Chevrolet Engine Speed Signal Circuit Problem

Tech description

There are seven (7) codes listed on the service manual for the P1647 Chevrolet code. Try reseting the code first, and if the code comes back, check fuses and the Engine Control Module (ECM) connector.

P1647 Chevrolet Description

P1647 Chevrolet – Power Command Signal Circuit Low Input

P1647 Chevrolet – Power Command Signal Circuit High Input

P1647 Chevrolet – Engine Torque Signal Circuit Low Input

P1647 Chevrolet – Engine Torque Signal Circuit High Input

P1647 Chevrolet – Mode Signal Circuit 1 Low Input

P1647 Chevrolet – Mode Signal Circuit 1 High Input

P1647 Chevrolet – Mode Signal Circuit 2 Problem