Moduł zasilania 14V — napięcie niskie
P0A09
WysokiHigh Voltage DC/DC Converter Malfunction
OBD-II (EN): DC/DC Converter Status Circuit
Code P0A09 signals a malfunction of the DC/DC converter, which converts HV voltage to 12V for the auxiliary electronics. Symptoms: low 12V voltage, unstable power supply. Requires HV system diagnosis.
Symptoms
HV malfunction indicator light, low 12V battery voltage (<12V), unstable auxiliary electronics power supply, 12V battery discharging while parked
Possible causes
Faulty DC/DC converter (converts HV to 12-14V), converter overheating, faulty control circuit, CAN bus communication problem with the converter
Affected systems
Related codes
Przetwornica DC/DC — usterka obwodu włączania
Moduł zasilania 14V — napięcie wysokie
Suggested Hybspec services
Based on the systems affected by this code, we will most likely start with:
Tags and synonyms
Does code P0A09 require professional diagnostics?
The code alone is not enough. To find the cause, you need to read live data, check freeze frame conditions, and compare with vehicle behavior. Book a diagnostic session.
