The BMS detects that battery pack subsection J is operating above the safe temperature threshold. Cell-level cooling or pack thermal management is compromised on this section.
High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Most likely causes
- Coolant flow to this section reduced
- Cell imbalance causes local heating
- Ground point with elevated resistance
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
What each character of P2D4E means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- D: Subsystem depends on the code range
- 4E: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2D4E?
If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
What causes code P2D4E?
The most common causes are: coolant flow to this section reduced; cell imbalance causes local heating; ground point with elevated resistance.
Related codes
- P2D4DHybrid/EV Battery Pack I Over Temperature
- P2D4FHybrid/EV Battery Pack K Over Temperature
- P2D4CHybrid/EV Battery Pack H Over Temperature
- P2D50Hybrid/EV Battery Pack L Over Temperature
- P2D4BHybrid/EV Battery Pack G Over Temperature
- P2D4AHybrid/EV Battery Pack F Over Temperature
- P2D49Hybrid/EV Battery Pack E Over Temperature
- P2D48Hybrid/EV Battery Pack D Over Temperature
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.