Code result
P0A40
Drive Motor A Position Sensor Circuit
High severity
What it means
Electrical fault on the resolver or encoder used to determine rotor position of drive motor A. Position is essential for vector control commutation.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Resolver failed
highOne of the most commonly reported causes for this code — check this first.
Resolver wiring shielding fault
mediumA plausible cause — test and verify before replacing parts.
Related help
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