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Engine-Codes.com | All About OBDII Engine Codes

P1682 GMC

P1682 GMC - Ignition 1 Switch Circuit 2

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P1682 GMC Comments |  Add Comment
Possible causes
- Faulty ignition switch
- Ignition Switch harness is open or shorted
- Ignition Switch circuit poor electrical connection
- Faulty Engine Control Module (ECM)
Help with Possible causes 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 GMC 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.

GMC Technical Service Bulletins for P1682 code
2007 GMC SIERRA 3500 Fuel System, Gasoline:storage:tank Assembly Details
2007 GMC SIERRA 3500 Fuel System, Gasoline:storage:tank Assembly:mounting Details
2007 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly Details
2007 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly:filling/charging Details
2007 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly:mounting Details
2008 GMC SIERRA 3500 Fuel System, Gasoline:storage:tank Assembly Details
2008 GMC SIERRA 3500 Fuel System, Gasoline:storage:tank Assembly:mounting Details
2008 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly Details
2008 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly:filling/charging Details
2008 GMC SIERRA 3500 Fuel System, Other:storage:tank Assembly:mounting Details
More Bulletins Help with Technical Service Bulletins What does this mean?
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