8l90 - Lateral-g Forums

vet57air · #1 06-10-2022, 03:33 PM

Quote:

Originally Posted by dhutton

Again, it has nothing to do with the display. The issue is a bus conflict which jacks up the ECM and generates codes etc…. Flaky stuff, just like you are describing.

Don

Gotcha. My original code I had was P18C2 for internal mode switch. I reset several times. Now that the switch has been replaced I get P18C2 "permanent".
Cannot reset. This is suppose to go away after several "cycles" and the ECU decides the repair is good. Nice to have a backup just in case. Wouldn't that be sweet if all I needed to do is change bus setting. Lol

vet57air · #2 06-13-2022, 08:27 AM

So my P18C2 "permanent" code is gone. As I had researched on the internet the error code on newer OBD2 goes "permanent" after you repair. Once the ecu sees the repair and monitors 3 fault free cycles or 1 fault free cycle after a scan tool clear DTC request, the permanent DTC will be erased. I am still amazed my GM dealer didn't know this. Caused me a lot of grief. Now back to our regular schedule of cruising and car shows.