The control module determined that the Hybrid Battery Negative Contactor did not change state as commanded and appears stuck.
TuningBot DTC Database · v4.37.15
P0AA5 Hybrid Battery Negative Contactor Circuit Stuck Open
Generic (OBD-II) interpretation in the TuningBot DTC database.
What P0AA5 means
Related and nearby codes
How to read P0AA5
Powertrain: engine, transmission and driveline systems.
Generic SAE-standard code: same meaning on every make.
Specific fault index within the subsystem.
Frequently asked questions about P0AA5
What does P0AA5 mean?
Hybrid Battery Negative Contactor Circuit Stuck Open. The control module determined that the Hybrid Battery Negative Contactor did not change state as commanded and appears stuck.
Is P0AA5 generic or manufacturer-specific?
P0AA5 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0AA5 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
Other file services
Understand the system behind this code: Diagnostic Strategy and DTC Logic
