Joined
·
29 Posts
Yes - my Service Engine Soon light has come on twice now, the first time after about 30 days (April 2017) at 1,800 miles and then againThe service indicator came on yesterday and stayed on for my few trips. Today it didn't come on. I am barely over 4900 miles so not even near the first servicing time. My dash just said service was due soon.
Has anyone else had this happen? Otherwise my Bolt is driving fine.
on 10/23/17 at 10,700 miles. Both times there were no known visible issues, the car ran fine and all the controls
were functional.
Both times I dropped the car off at the dealer, they ran diagnostics, updated and/or reprogrammed the HPCM2 (Hybrid/EV Powertrain Control Module 2),
whatever all that means, and I was back on the road.
Codes:
1st time: U18A4 - Lost communication with Hybrid/EV Battery DC Charging Communications Gateway Module
2nd time: P3021 - Hybrid/EV Battery DC Charging Negative Voltage Sensor Stuck Low
Hopefully this is the worst I'll experience...