Auxiliary 12 V battery
Last reviewed 2026-08-31
Description
Low-voltage battery, often a manufacturer PID on hybrids.
- Unit
- V
- Group
- electrical
Protocol requests
The same meaning can arrive through different mode + PID + ECU header combinations. Do not merge by hex number alone.
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Bat Auxiliary Battery Voltage
12 V auxiliary battery voltage. Not HV pack voltage. Documented for Toyota Prius Gen1 (NHW11) via Torque custom PIDs. Requires manufacturer ECU header 84D5F1 — not a generic OBD broadcast.
OBD · mode 01 · PID B7 · header 84D5F1 · primary
Source label: Bat Auxiliary Battery Voltage
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HV Auxiliary Battery Voltage
12 V auxiliary battery voltage. Not HV pack voltage. Documented for Toyota Prius Gen1 (NHW11) via Torque custom PIDs. Requires manufacturer ECU header 8416F1 — not a generic OBD broadcast.
OBD · mode 01 · PID D8 · header 8416F1 · alternate
Source label: HV Auxiliary Battery Voltage
Platforms that list this signal
Sources
Provenance for this page. Official standards outrank community notes. See the confidence policy.
community · medium trust
Prius Gen1 (NHW11) Torque PID list
Prius_gen1_NHW11_torque_PIDs.csv