Diagnostic code selector
P0AA400 EV diagnostic code
Common search variants: P0AA4-00 · Search ignores case, spaces and common separators.
This code exists in verified records for multiple manufacturers. Choose your vehicle maker so the report does not mix manufacturer-specific meaning, applicability or service guidance.
Audi P0AA400Hybrid/EV Battery Negative Contactor Circuit Stuck ClosedOpen manufacturer report →Jeep P0AA400Hybrid Battery Negative Contactor Circuit Stuck Closed becoming active after a flash software update. If P0AA4-00 becomes active, the DTC will only clear with a HV Battery replacemOpen manufacturer report →