P0D4E: Battery Charger Hybrid/EV Battery Output Voltage Sensor Circuit Low

P0D4E reports a signal below the valid range for the sensor measuring the charger's DC output toward the traction battery. In GM's charger module for the 2011-2014 Volt and ELR the raw value must stay at or below 2.62 V for 400 of 500 ms; the fault is Type A and lights the MIL at once. The 2016-2019 Volt reads the sensor as a duty cycle and treats 8 % or less, or a signal stuck at 100 %, as low, Type B. Mitsubishi's 2022 Outlander PHEV calls it a short to ground: under 0.943 V, equal to about -7 V, for 0.5 s; charging is stopped and the charger/DC-DC unit is replaced. GM's Bolt EI PIE0828 also lists the code. Its counterpart is P0D4F; plausibility errors fall under P0D4D.

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

Charging stops or does not start
MIL on (GM)
Charging fault message

Most likely causes

Voltage sensor signal shorted to ground inside the charger
On-board charger (Mitsubishi charger/DC-DC unit) failed
Internal reference supply of the measuring circuit missing

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

What each character of P0D4E means

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

Frequently asked questions

Can I keep driving with code P0D4E?

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 P0D4E?

The most common causes are: voltage sensor signal shorted to ground inside the charger; on-board charger (Mitsubishi charger/DC-DC unit) failed; internal reference supply of the measuring circuit missing.

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.