P0E44: Hybrid/EV Battery Pack Voltage Sense E Circuit

P0E44 is the basic circuit code for the fifth pack voltage measurement, channel E, which follows channels A to D (P0ABA, P0B14, P0B19, P0B1E) in the code list. The battery controller stores it when this input is electrically unusable, for example open, without a plausible raw value or failing a self-test of its measuring stage, and none of the more specific low, high or erratic codes fits. No manufacturer documents P0E44 publicly, and which tap a maker labels E is its own decision. CARB requires every voltage sensor of the hybrid energy storage system to be monitored as an input component, with codes narrowing the fault down to a replaceable part. Without this value the controller restricts or blocks high-voltage operation.

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

Hybrid or high-voltage system warning lit
Reduced electric assist or limited battery power
Vehicle may not switch to ready mode

Most likely causes

Open or unplugged voltage sense lead or connector inside the pack
Faulty measuring stage or input of the battery controller
Blown fuse or open resistor in the sense path

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

It can trigger limp mode.
It affects emissions.

What each character of P0E44 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
E: Subsystem depends on the code range
44: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E44?

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 P0E44?

The most common causes are: open or unplugged voltage sense lead or connector inside the pack; faulty measuring stage or input of the battery controller; blown fuse or open resistor in the sense path.

Related codes

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.