What are the common causes of P0DE6?

One or more weak cells that fall below the pack average. A cell with excessive self-discharge. A faulty cell voltage sensing lead reading low. A pack that has been deeply discharged and will not recover.

Read per-cell voltages and find the low cell. Compare the low group to the rest of the pack. Check the cell sensing harness for that group. Charge and recheck the cell for recovery. Replace the battery module if the cell stays low. Clear the code and retest.

P0DE6

Hybrid/EV Battery Pack Cell Voltage Low

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P0DE6 means Hybrid/EV Battery Pack Cell Voltage Low.

Check these first

One or more weak cells that fall below the pack average
A cell with excessive self-discharge
A faulty cell voltage sensing lead reading low
A pack that has been deeply discharged and will not recover

What to do next

Read per-cell voltages and find the low cell
Compare the low group to the rest of the pack
Check the cell sensing harness for that group
Charge and recheck the cell for recovery
Replace the battery module if the cell stays low
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.