I have a 2008 Jeep Liberty with ~77000 miles on it. So I have been working on this last night and this morning. This might get a bit lengthy but I want to include everything I know. Last night I got off work at 5:00 pm and got out to my car and it started fine, drove it the grocery store picked up some food came out and it started fine again, no noticeable differences in the way it started. Drove it home and was in there for about 15 minutes then went back outside to drive somewhere and it was dead. The keyless entry doesnt work, the interior lights don't turn on when the door is opened, when you turn the key there is absolutely nothing from the engine but the gauge lights and a bunch of the cluster lights come on as well as all the lights down by the hazard lights button and the radio comes on. The only thing I get by the odometer is the "no bu5" error message. The lights that stay solid/don't flash when i turn the key are:
- Check Engine
- Electronic Throttle Control
- Low Fuel
- Charging System Warning
- Oil Pressure
- Security Red Light
- BRAKE
- ESP/BAS
The only one that flashes is the TPMS light. I don't really know where to start looking to diagnose this one and I am afraid that it is going to be expensive to fix. From what I understand is that the ECU or some other part of the electrical system has lost communication with the bus and that is what is throwing this error, but I don't really know where to go from there. Sorry for the long post I just wanted to include information hoping someone could help.
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