Check engine light
Thread Starter
1st Gear
Joined: Feb 2020
Posts: 1
Likes: 0
From: Rural Ridge Pa
Check engine light back on
I jumped a car using the battery terminals before noticing the proper way to use the fuse terminal and engine block bolt. Now my check engine lights on and reading a P1682 ignition 1 switch circuit 2 which said to replace the ignition relay so I did but it still has the check engine and the ignition button has to be pushed a couple times to shut the car off and light which STAYS on even after the cars off until the battery dies. Any help would be greatly appreciated it’s a 2009 C6 1LT
After I pulled the ecm fuse and put it back the check eng light went out but now after starting it a couple times it’s back on. This is driving me crazy my buddy’s a top tech at pep boys and he said just jumping a car from the terminals shouldn’t have messed up anything so I’m gonna lose it if I don’t get this resolved! Any suggestions would be appreciated!! Also when I try to shut the car off the button dosent stop the engine I have to hold it then the engine finally sputters out. Wtf??
update: checked battery level on a tender it said it was at 2% so fully charged it and all seems ok but I’ll have to keep checking it to make sure
After I pulled the ecm fuse and put it back the check eng light went out but now after starting it a couple times it’s back on. This is driving me crazy my buddy’s a top tech at pep boys and he said just jumping a car from the terminals shouldn’t have messed up anything so I’m gonna lose it if I don’t get this resolved! Any suggestions would be appreciated!! Also when I try to shut the car off the button dosent stop the engine I have to hold it then the engine finally sputters out. Wtf??
update: checked battery level on a tender it said it was at 2% so fully charged it and all seems ok but I’ll have to keep checking it to make sure
Last edited by Edemino; Feb 17, 2020 at 07:06 PM.
Instructor
Joined: Aug 2005
Posts: 110
Likes: 41
From: Iowa
The ECM has two ignition circuits supplying power to it from two different relays. If the ECM sees a difference of more than 3 volts between the ignition feeds, it will set this code. I would check the ECM/TCM/EASY KEY fuse and the PT INPUT fuse in the underhood fuse block. Also check the ECM fuse at the BCM.
Last edited by joshp14; Feb 16, 2020 at 01:30 PM.
