2009 Chevy Impala Code P1682 - Cars & Trucks

Aobd2

• 1049 Answers
• Posted on Jul 14, 2011

SOURCE: 2007 Chevy Equinox, got a

The ignition 1 voltage of the Run/Crank relay is more than 3 volts different than the ignition 1 voltage of the power train relay for more than 2 seconds .
if your car is still under warranty run it to the dealer to have this diagnosed, this could be a
complicated process. this could be a problem in the circuit or the ECM( engine control module).

SOURCE: code P1682 in chevy cobalt

This comes up as a PCM failure. Most often an igniton siwtch connection or problem is the likely cause.

Raceline Central

• 365 Answers
• Posted on Jun 23, 2015

SOURCE: Chevy code P1682?

P1682 Chevrolet - Ignition 1 Switch Circuit 2

Possible causes
- Faulty ignition switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
What does this mean? What does this mean?
When is the code detected?
The ECM has detected a voltage deifference between two circuits
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible no crank or start
P1682 Chevrolet Description

There are 2 ignition 1 voltage circuits supplied to the Engine Control Module (ECM). The first ignition 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 second ignition 1 voltage circuit is supplied by the run/crank relay through a fuse, and is used to power the remaining internal ECM circuits. If the ECM detects a voltage difference between the 2 ignition 1 voltage circuits, DTC P1682 will set

Read more: http://engine-codes.com/p1682_chevrolet.html#ixzz3dr4CYBUT

P1682 Chevrolet Ignition 1 Switch Circuit 2

engine-codes.com

There are 2 ignition 1 voltage...