P0D33: DC/DC Converter Current High

P0D33 says the DC/DC converter carries more current than its limit. The converter links the high-voltage or 48 V system with the 12 V network; an internal short in the power stage, a shorted 12 V cable or consumer, or a failed output stage can push the current beyond what the converter accepts, and it then switches off to protect itself. LKQ Electriq, a high-voltage component remanufacturer, reports P0D33 together with a charging system fault message on Land Rover 48 V mild hybrids (Defender, Evoque, Discovery Sport, Velar); in its bench tests the cause was usually a fault on the converter's internal circuit board, not the vehicle wiring. No manufacturer publishes test limits. The 12 V battery stops being charged and the car may later fail to start. Overheating is P0D32.

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 system fault message
12 V battery not charged, later no start
Electrical consumers switched off

Most likely causes

Internal circuit board fault in the converter (Land Rover MHEV)
Short in a 12 V cable or consumer on the converter output
Damaged high-voltage or 48 V supply cable

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

It can trigger limp mode.
It affects emissions.

What each character of P0D33 means

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

Frequently asked questions

Can I keep driving with code P0D33?

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 P0D33?

The most common causes are: internal circuit board fault in the converter (Land Rover MHEV); short in a 12 V cable or consumer on the converter output; damaged high-voltage or 48 V supply cable.

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.