HV battery state of charge

Last reviewed 2026-08-31

Hybrid / PHEV specific

Description

Traction battery SOC. May be standard PID 5B, a UDS DID, or a manufacturer Mode 01 request. Never merge by hex number alone.

Unit

%

Group

hybrid_hv

Protocol requests

The same meaning can arrive through different mode + PID + ECU header combinations. Do not merge by hex number alone.

• Hybrid/EV battery pack remaining life

  J1979 name is pack remaining life; many scan tools label it as HV battery SOC. Only present when the ECU implements this standard PID — many HEV/PHEV use manufacturer Mode 21/22 or UDS 0x22 instead.

  OBD · mode 01 · PID 5B · default header · primary

  Source label: Standard J1979 mapping

• Bat State-of-Charge

  High-voltage traction battery state of charge (%). Not fuel tank level and not 12 V auxiliary battery 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 91 · header 84D5F1 · primary

  Source label: Bat State-of-Charge

• Bat Delta State-of-Charge

  High-voltage traction battery state of charge (%). Not fuel tank level and not 12 V auxiliary battery 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 BC · header 84D5F1 · alternate

  Source label: Bat Delta State-of-Charge

• HV State-of-Charge

  High-voltage traction battery state of charge (%). Not fuel tank level and not 12 V auxiliary battery 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 C9 · header 8416F1 · alternate

  Source label: HV State-of-Charge

• M Hybrid Pack Remaining (SOC)

  High-voltage traction battery state of charge (%). Not fuel tank level and not 12 V auxiliary battery voltage. Documented for Chevrolet Volt / Opel Ampera (Voltec Gen1) via Torque/UDS. Requires UDS ECU address 7E0 — not a generic OBD broadcast.

  UDS · mode 22 · PID 005B · header 7E0 · alternate

  Source label: M Hybrid Pack Remaining (SOC)