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?
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#ixzz3Djm8K11C
Hi Jim Kanniard, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box? No such code listed. Could it be some other code?
Coral crank over but will not start for like three hours
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