P0A74 Hybrid/EV Powertrain Active Discharge Time Too Long

P0A74 indicates Hybrid/EV powertrain active discharge time is too long. High-voltage bus voltage is not dropping fast enough after shutdown command.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Hybrid / EV
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not touch high-voltage components until the bus voltage is verified safe with approved equipment.

Useful checks before replacing parts

Review active discharge command, DC bus voltage decay time, contactor state, inverter status, freeze-frame data, and related voltage sensor codes.
Inspect discharge resistor or inverter discharge path where applicable, control wiring, module grounds, contactor behavior, connectors, and water intrusion.
Confirm whether slow voltage decay is real or caused by inaccurate bus voltage sensing before replacing inverter or converter parts.

Related OBD-II codes

These nearby hybrid / ev entries can help compare wording and fault area. They may share the same verification status as the source database.