2026-07-21 · 4 min read
Toyota Prius DC-DC Converter Guide Malaysia
Prius has no alternator — the DC-DC converter charges the 12V battery from the HV battery. Failure symptoms and Malaysia repair cost.
Prius has NO traditional alternator — the 12V battery is charged by a DC-DC converter that steps down from the HV battery. If the 12V battery keeps going flat despite being new: the DC-DC converter may be failing.
DC-DC Converter Details
- DC-DC converter fault: P0A7A code — 12V system not charging; HV system may also show faults
- DC-DC converter replacement: RM 1,500–3,000 — major hybrid component; verify with Techstream before replacing