LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different car >> Section 435 (Hybrid Battery System (Li-Ion W/ Pa10) - Diagnostic Codes (2 Of 2) & Circuit Tests) >> HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10) >> DTC P3000-4B: Hybrid/EV Battery Control System Over Temperature [09/2022 - ] >> Description

DTC P3000-4B: Hybrid/EV Battery Control System Over Temperature [09/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Toyota Corolla, 2024 Toyota Corolla, and 2023 Toyota Corolla. 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 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
  • HV battery
Does not come on Master Warning:
Comes on
SAE Code: P3000

HINT: 

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