HHR Electrical Chaos: Control Module Mystery Decoded

I had nearly identical issues with my 2011 Chevy Malibu last year. The unusual electrical problems were traced to a faulty BUS system connection at the main control module. The OBD-II scan showed multiple unusual codes, just like yours. The root cause was corroded cable connections between the control module and the vehicle's BUS system. These connections handle all the electronic communications between different systems, which explains the unusual issues with your radio, nav, and warning signals. This isn't just a minor annoyance, it's actually a serious issue that needs addressing. Left unfixed, it can lead to complete electronic system failure. The repair involved cleaning all connection points and replacing some damaged wiring harness components. The malfunction indicator stopped appearing after the fix, and all systems returned to normal operation. Get it checked specifically for BUS system connectivity issues and control module connections. Make sure they use proper diagnostic equipment, basic OBD-II scanners might not catch the underlying communication problems between systems.

Thanks for sharing that info about the BUS system, sounds exactly like what I'm dealing with! My warning light and service required messages were driving me crazy before I got it fixed. The mechanic found similar corroded connections in my HHR's control module wiring. Did you remember roughly how much the repair cost you? Also curious if you've had any other electrical gremlins pop up since they fixed those connections? My OBD-II is showing clean now, but I keep wondering if I should be watching for any other potential system failure signs.

Good to hear you got that sorted out! Yes, the repair came to 155 for fixing the faulty cable connection at the control module. The corrosion in those BUS system connections was definitely the culprit causing all those unusual warning signals and service required messages. Haven't seen a single electrical gremlin since the repair was done, all systems have been working perfectly. The malfunction indicator hasn't flickered once, and the engine diagnostics are running clean. It's such a relief not having those unusual electronic glitches anymore. From my experience, once they properly fix the control module connections, the problem typically doesn't come back. Just keep an eye on your dashboard for any new warning signals, but you shouldn't see those unusual system failures anymore. The repair they did should have taken care of the root cause. Just make sure to keep your service records in case you need to reference what was done. A properly repaired BUS system connection should give you years of trouble-free operation.

Got my car back from the shop yesterday after dealing with those frustrating electrical issues. The mechanic found corroded connections in the BUS system, just like you mentioned. Cost me about €200 for the complete fix, including cleaning all the connection points and replacing a section of damaged wiring. The check engine light has finally stopped its unusual dance, and my dash isn't lighting up like a Christmas tree anymore. The radio and nav system are working perfectly now, what a relief! The OBD-II scan came back clean after the repair. Really glad I pushed for a proper system failure diagnosis instead of just accepting the first mechanic's vague explanation. The warning signals haven't appeared since, and everything's running smoothly. Thanks again for pointing me in the right direction with the BUS system issue, saved me from a lot more headaches!