P0E63: Battery Charger A Enable Circuit High

P0E63 is the high-level counterpart: the enable signal to charger A sits above the level its commanded state allows, for instance because it touches a 12 V feed. In practice the charger may then be woken although no charging is requested, which can drain the 12 V battery while parked, or it may ignore a switch-off command. No manufacturer documents P0E63 publicly. GM documents only the generic enable fault P0E61 for the 2016 Volt (VICM) and in the 2019 hybrid tables (HPC2), evaluated via a hardware fault flag with 30 failures in 40 samples as Type B; separate low and high codes are not listed there. CARB counts any charger fault that disturbs charging as one a plug-in hybrid must detect. A wire chafed against a powered harness or an internal short in the charger are the usual suspects.

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

12 V battery drained while parked
Charger active or charging not ending as expected
Charging system warning

Most likely causes

Enable wire shorted to a 12 V supply
Enable input of the charger faulty
Driver stage in the commanding module stuck on

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
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
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

Repair difficulty: hard

What each character of P0E63 means

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

Frequently asked questions

Can I keep driving with code P0E63?

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 P0E63?

The most common causes are: enable wire shorted to a 12 V supply; enable input of the charger faulty; driver stage in the commanding module stuck on.

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.