Butch055
New member
- Joined
- Feb 20, 2025
- Messages
- 3
- Reaction score
- 2
- Points
- 3
- Genesis Model Year
- 2012
- Genesis Model Type
- 1G Genesis Sedan (2009-2014)
I have seen a lot of people have had Can Bus issues and I believe my car is having similar issues. I'm hoping someone can point me to the best place to start looking as I've been fighting with this car since I purchased it over a year ago.
To start, I have a 2012 Genesis R-Spec sedan with around 110,000 miles on it that I got at a local auction with no disclosed issues. After driving it for just a short period of time I started to have issues with both the EPB and the transmission. On top of those 2 pretty blatant issues, the gauges would randomly act up and some lights would come on at times. Once restarting the car the random issues usually subsided, but the transmission and epb issues were constant. I took it to my local dealer while under an aftermarket warranty and they changed the EPB and transmission. They also replaced the alternator (supposed electric issue source) and I had replaced the battery the week I took it to the dealer. The dealer had my car for 5 months trying to find and fix all of the issues. On my way home from the dealer, many of the lights came back on again. I called them and their response was I could give it back to them to keep looking for the issues, but they were at a loss. They said it looked like it was exposed to water underneath the car for a prolonged amount of time. I spent thousands above what the warranty covered and still have to deal with issues.
At that point in time, the only lights that would be on continuously was the airbag warning lamp. It showed as B1493 (faulty pass seat switch/poor connection. The ambient temp was also not registering at this time. A parking sensor would also randomly trigger. I can live with those minor issues. The Auto Hold, EPB and ESC lights would randomly come on, but would always go away.
I was okay driving with those minor issues, and scheduled my annual inspection and the day before I had more issues. I hit a pot hole (thank you PA) and all of a sudden things went haywire. The car continued to run and drive well, but an electrical connection was definitely lost. Here is a list of all of the issues I now have:
-Tachometer no longer working (will randomly bounce up, just to drop again in a second)
-no reading from the temp gauge
-TPS light on with no indicator on the car diagram (all tires are at good pressures)
-TPMS light on
-Auto Hold light on
-ESC light on
-EPB light on
-airbag light on
-transmission indicator is gone (flashes back when tach moves)
-adaptive front lighting system light comes on and goes off randomly
-warning light for adaptive cruise control
-cruise control does not work or even light up at all on the dash when trying
The big shock was when I took it to a dealer for inspection, they tried to look into things. There was no signal from the OBD port, only power to the scanner. This means there is no way for it to pass the annual inspection in PA and a the end of the month it is worthless. The car still drives great but does me no good if I cannot find the electrical issue. I'm assuming there is a bad ground, module or some kind of broken wiring. I'm hoping that maybe the issues all point to one section of the wiring harness or one starting point to start looking into. I have seen that simple sensors and switches failing can cause the Can Bus to fail as the system needs a proper amount of resistance and any failure can cause multiple issues. Any guidance is greatly appreciated!
-Mark
To start, I have a 2012 Genesis R-Spec sedan with around 110,000 miles on it that I got at a local auction with no disclosed issues. After driving it for just a short period of time I started to have issues with both the EPB and the transmission. On top of those 2 pretty blatant issues, the gauges would randomly act up and some lights would come on at times. Once restarting the car the random issues usually subsided, but the transmission and epb issues were constant. I took it to my local dealer while under an aftermarket warranty and they changed the EPB and transmission. They also replaced the alternator (supposed electric issue source) and I had replaced the battery the week I took it to the dealer. The dealer had my car for 5 months trying to find and fix all of the issues. On my way home from the dealer, many of the lights came back on again. I called them and their response was I could give it back to them to keep looking for the issues, but they were at a loss. They said it looked like it was exposed to water underneath the car for a prolonged amount of time. I spent thousands above what the warranty covered and still have to deal with issues.
At that point in time, the only lights that would be on continuously was the airbag warning lamp. It showed as B1493 (faulty pass seat switch/poor connection. The ambient temp was also not registering at this time. A parking sensor would also randomly trigger. I can live with those minor issues. The Auto Hold, EPB and ESC lights would randomly come on, but would always go away.
I was okay driving with those minor issues, and scheduled my annual inspection and the day before I had more issues. I hit a pot hole (thank you PA) and all of a sudden things went haywire. The car continued to run and drive well, but an electrical connection was definitely lost. Here is a list of all of the issues I now have:
-Tachometer no longer working (will randomly bounce up, just to drop again in a second)
-no reading from the temp gauge
-TPS light on with no indicator on the car diagram (all tires are at good pressures)
-TPMS light on
-Auto Hold light on
-ESC light on
-EPB light on
-airbag light on
-transmission indicator is gone (flashes back when tach moves)
-adaptive front lighting system light comes on and goes off randomly
-warning light for adaptive cruise control
-cruise control does not work or even light up at all on the dash when trying
The big shock was when I took it to a dealer for inspection, they tried to look into things. There was no signal from the OBD port, only power to the scanner. This means there is no way for it to pass the annual inspection in PA and a the end of the month it is worthless. The car still drives great but does me no good if I cannot find the electrical issue. I'm assuming there is a bad ground, module or some kind of broken wiring. I'm hoping that maybe the issues all point to one section of the wiring harness or one starting point to start looking into. I have seen that simple sensors and switches failing can cause the Can Bus to fail as the system needs a proper amount of resistance and any failure can cause multiple issues. Any guidance is greatly appreciated!
-Mark
