DTC P3000-4B: Hybrid/EV Battery Control System Over Temperature [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

The battery ECU assembly monitors the temperature of the HV battery to detect if it becomes excessively high.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P3000-4B	Hybrid/EV Battery Control System Over Temperature	The battery ECU assembly detects a HV battery cooling system error signal. (1 trip detection logic)	Hybrid vehicle control ECU assembly No. 1 HV supply stack sub-assembly No. 2 HV supply stack sub-assembly No. 3 HV supply stack sub-assembly No. 4 HV supply stack sub-assembly	Does not come on	Master Warning: Comes on	HV Battery	A	SAE Code: P3000

HINT:

The normal HV battery temperature is 60°C (140°F) or less.