P0A94 on Audi
DC/DC Converter Performance
P0A94 on Audi vehicles indicates dc/dc converter performance. Au7o has documented this code across 1 Audi model — most commonly on Q4 e-tron. This hybrid/electric vehicle code sets when the hybrid control system detects that the DC/DC converter is not performing within expected parameters. The DC/DC converter steps the high-voltage battery power down to the 12-volt level that runs the car's lights, accessories, and control modules, so a performance fault can affect the whole low-voltage system. Symptoms may include warning lights, reduced power, the hybrid system not starting, or a discharged 12-volt battery. Because high-voltage components are involved, diagnosis and repair should be done by a qualified hybrid technician.
Common Causes of P0A94
- •Faulty inverter/converter assembly (DC/DC converter)
- •Open or shorted wiring in the converter circuit
- •Poor electrical connection at the converter
- •Weak or failing 12-volt battery
- •High-voltage system or cooling fault affecting the converter
- •Software/control module calibration issue
- •Faulty hybrid control module (less common)
P0A94 on Audi by Model
Audi Q4 e-tron(1 issue)
- 2024-2025 Audi Q4 e-tron On-Board-Charger Recall 93FR / NHTSA 25V1252024-2025
NHTSA campaign 25V125 / Audi 93FR covers certain 2024-2025 Q4 e-tron and Q4 e-tron Sportback vehicles. The on-board charger can fail and stop charging the 12-volt battery, which can lead to loss of drive power and increase crash risk. Eligibility is VIN-specific; this does not support the former universal sensor, relay, battery or software-glitch diagnosis.
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View P0A94 across all makes →Frequently Asked Questions
What does P0A94 mean on Audi?▼
P0A94 stands for "DC/DC Converter Performance." This hybrid/electric vehicle code sets when the hybrid control system detects that the DC/DC converter is not performing within expected parameters. The DC/DC converter steps the high-voltage battery power down to the 12-volt level that runs the car's lights, accessories, and control modules, so a performance fault can affect the whole low-voltage system. Symptoms may include warning lights, reduced power, the hybrid system not starting, or a discharged 12-volt battery. Because high-voltage components are involved, diagnosis and repair should be done by a qualified hybrid technician. On Audi specifically, this code is documented across 1 model.
What causes P0A94 on Audi vehicles?▼
Common causes on Audi: Faulty inverter/converter assembly (DC/DC converter), Open or shorted wiring in the converter circuit, Poor electrical connection at the converter, Weak or failing 12-volt battery, High-voltage system or cooling fault affecting the converter. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0A94 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have P0A94 documented?▼
Au7o has documented P0A94 on 1 Audi model: Q4 e-tron.