P0E4B: Hybrid/EV Battery Pack Voltage Sense F Circuit Low

P0E4B sets when pack voltage measurement F falls below its plausible minimum, which normally points to a sense path shorted to ground, an open sense fuse or a defective input of the battery controller. No manufacturer documents P0E4B publicly. As a reference, the battery energy control module in GM's 2019 hybrid tables sets the channel A code P0ABC when pack-side voltage stays under 24 V for 1.6 s within a 2 s window, Type A, one trip, as long as system voltage is at least 9 V. CARB requires out-of-range checks of battery voltage sensors. P0E4C is the high counterpart, P0E4A the plausibility fault, and the matching low code of channel E is P0E46. Because precharge and contactor checks rely on the reading, the vehicle may not reach ready mode.

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

No ready mode or contactors do not close
MIL and high-voltage warning on

Most likely causes

Channel F sense lead shorted to ground or pack housing
Open fuse or resistor in the channel F sense path
Failed analog input of the battery controller

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
With the connector unplugged, check whether the signal wire is making contact with ground.
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 P0E4B means

P: Powertrain: engine and transmission
0: Generic code: same on every make
E: Subsystem depends on the code range
4B: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E4B?

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 P0E4B?

The most common causes are: channel F sense lead shorted to ground or pack housing; open fuse or resistor in the channel F sense path; failed analog input of the battery controller.

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.