P0AA1
Hybrid Battery Positive Contactor Circuit
High-voltage contactors · Powertrain
critical
What does this code mean?
A fault detected in the positive high-voltage contactor circuit.
This is a generic OBD-II / UDS code — the meaning is standardized across manufacturers.
Possible symptoms
Vehicle does not start
Battery warning
Check EV system
Possible causes
- 1.Contactor welding or coil fault
- 2.BMS driver circuit fault
- 3.Wiring issue
These are possible causes — a professional inspection is required to confirm.
Diagnostic procedure & recommended checks
- Check contactor resistance and coil drive
- Check BMS DTCs
Recommended actions
- Do not bypass — high-voltage repair by qualified personnel required
Can I drive?
No
When to contact a professional
Immediately.
Related Fix & Solve guides
Diagnostic information is provided for informational purposes and does not replace professional inspection. High-voltage systems must only be serviced by qualified personnel.