Question

what does this code mean P1682 on a 2009 chevy cobalt-My check engine light is on. Please help me!

Answer 1

There are 2 ignition 1 voltage circuits supplied to the engine control module (ECM). The first ignition 1 voltage circuit is provided by the powertrain relay, through a fuse. This ignition 1 voltage circuit supplies power to all the internal ECM circuits associated with the throttle actuator control (TAC) operation. The run/crank relay provides the second ignition 1 voltage circuit to the ECM, through a fuse. This ignition 1 voltage provides power to other internal ECM circuits, except those associated with TAC operation. The ECM continuously monitors the voltage level difference between the two circuits

This code could actually be the result of a dead or weak battery in the car.

 

Answer 2

P1682 CHEVROLET - Ignition 1 Switch Circuit 2

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