Check VSC System, CEL light, Trac Lite, 4Lo Flashing (1 Viewer)

[LCAdvocate]

I've read everything from this site and others that point the finger at the gas cap seal or click, vacuum valve assembly, neutral safety switch, lift installs, moisture / corrosion in electrical plugs or coming in around roof rack mounts, to the ECM as being the cause of this problem. My 2011 does this every so often. I just unplug the negative and let it reset. I took it in one time recently to have it scanned it was an ABS 1021 code. Not long after looking at his computer, the mechanic said I needed a new ECM. He went right to a spendy fix. Has anyone narrowed this down or figured out the true problem? Thanks

 

[AnyMal]

Have you checked CDL actuator / transfer case function? That is what i know brings up all those codes.
I know its all over the forum at least, hence why i exercise mine regularly and only use the pricey gear oil.

 

[LCAdvocate]

Thanks, I'll check it out

Have you checked CDL actuator / transfer case function? That is what i know brings up all those codes.
I know its all over the forum at least, hence why i exercise mine regularly and only use the pricy gear oil.

Thank you, I will check that out

 

[Onewldcat]

I have the same issue occurring randomly on my 2008 LC. Yesterday I hooked up a battery charger to get an alternator read. I’ve heard charging error can set all these lights off. While running I got a reading of 13.6V, killed the engine and got a battery reading of 13.0V. Does anyone know if 13.6V charge is normal for the oem alternator?