P0D4F: Battery Charger Hybrid/EV Battery Output Voltage Sensor Circuit High

P0D4F is the high-side fault of the charger's output voltage sensor: the reading climbs beyond anything the battery could actually present. GM's 2011-2014 charger module for the Volt and ELR flags a decoded value of 482 V or more for 400 of 500 ms as a Type A fault with immediate MIL. In the 2016-2019 Volt the sensor delivers a pulse-width signal; 92 % duty cycle or more, or a line resting at 0 %, counts as high and is rated Type B. For the 2022 Outlander PHEV Mitsubishi sets the code at a sensor voltage above 3.5 V, about 632 V, held for 0.5 s, describes it as a short to supply, stops charging and replaces the charger/DC-DC unit. GM's Bolt EI PIE0828 names it too. The low counterpart is P0D4E.

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

AC charging refused
MIL on (GM)
Charging interrupted with fault message

Most likely causes

Voltage sensor signal shorted to a supply voltage inside the charger
Measuring stage of the on-board charger failed
Charger software misinterprets the signal

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

What each character of P0D4F means

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

Frequently asked questions

Can I keep driving with code P0D4F?

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 P0D4F?

The most common causes are: voltage sensor signal shorted to a supply voltage inside the charger; measuring stage of the on-board charger failed; charger software misinterprets the signal.

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.