Onboard Charging System Hardware Fault
The Battery Management System cannot establish proper current control loops with the integrated internal AC onboard charger module. This prevents the vehicle from taking in standard alternating current from home wall boxes or public level 2 charging units.
Estimated Cost
$1,950
Repair Time
3-5 hours
Difficulty
Dealer Only
Can I Fix This Myself?
Professional Service Recommended
This repair involves high-voltage components or specialized equipment.
What professionals will use:
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Step-by-Step Fix Instructions
- 1
Verify that your home wall connector charger handle is undamaged and doesn't feature thermal discoloration.
- 2
Perform an explicit system scroll-wheel electronic soft reset to clear potential logic bus communication lockups.
- 3
Connect a Level 3 DC Fast Charger to see if bypassing the internal AC conversion matrix allows direct fast charging.
- 4
Check the high-voltage AC input orange harness connection points for safe locking orientation.
- 5
Lower the main electronics subframe plate to access the internal charging controller block.
- 6
Replace the faulty internal AC onboard charger (OBC) unit and reflash module security keys.
Check Your Warranty Before Paying
Federal law requires EV battery warranty coverage for 8 years / 100,000 miles minimum. Many manufacturers offer 10-year coverage. An authorized dealership can confirm coverage for your VIN at no charge.
Step-by-Step Diagnostic Wizard
Answer each question to narrow down the root cause of your BMS_a167 fault.
No step-by-step guide yet for BMS_a167
We're still writing the diagnostic flow for this code.
An EV specialist can run a live diagnosis in 15–30 minutes and give you a firm repair quote.
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