P0ED1

Hybrid/EV Battery F Voltage Unstable

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$167–889 (est.)

Symptoms

Reduced vehicle power
Increased fuel consumption (for hybrids)
Warning messages on the instrument panel
Maximum speed limit
The car goes into emergency mode

Causes

Wear of individual elements of the high-voltage battery
Problems with the Battery Management System (BMS)
Malfunction of charge/discharge circuits
Poor contact in high voltage connections
Voltage imbalance between battery modules

How to Fix

Diagnostics of a high-voltage battery with special equipment
Checking and cleaning high voltage connections
Balancing Battery Modules
Replacing faulty battery cells
Battery Management System (BMS) Software Update

Related codes

P0ED0 P0ED2 P0A80