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P056200 — Supply voltage - voltage too low

Supply voltage - voltage too low. The Taycan, 911 (992), Panamera (971), Panamera (972) and Cayenne report this code; below is which control unit sets it on each model and how to read and clear it.

Which models and control units set P056200

Porsche Taycan

Battery Energy Control ModuleBrake ElectronicsBrake BoosterDrive Motor Control ModuleEngine Control Module 1Thermal Management

Porsche 911 (992)

Battery Energy Control ModuleBrake ElectronicsEBKV (Bremskraftverstaerker)DC/DC Converter Control Module HVDrive Motor Control ModuleEngine Control Module 1TME (Thermomanagement)

Porsche Panamera (971, 2017–2023)

Auxiliary Heater48 V Battery Management SystemBattery Energy Control ModuleBrake ElectronicsEBKV (Bremskraftverstaerker)Drive Motor Control ModuleEngine Control Module 1TME (Thermomanagement)

Porsche Panamera (972, 2024–)

Auxiliary HeaterBattery Energy Control ModuleBrake ElectronicsEBKV (Bremskraftverstaerker)DC/DC Converter Control Module HVDrive Motor Control ModuleTME (Thermomanagement)

Porsche Cayenne (9YA)

Auxiliary Heater48 V Battery Management SystemBattery Energy Control ModuleBrake ElectronicsEBKV (Bremskraftverstaerker)DC/DC Converter Control Module HVDrive Motor Control ModuleEngine Control Module 1TME (Thermomanagement)Torque Converter (Transmission)

How to read and clear P056200

  1. Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
  2. Open STEUER14, pick your car and run a fault scan: every control unit is read, and P056200 shows with its status, its full description and the freeze frame when the unit stores one.
  3. Fix the cause first, then clear the fault memory and scan again to check it stays away. Reading and clearing fault codes is free on every control unit.

More about fault memory in the manual →

Download STEUER14 — free fault reading

Other codes of the Battery Energy Control Module

B201200Coding
B201500Production mode active
C109400Busbars - temperature measurement implausible
C109421Busbar, temperature – below limit value
C109422Busbar, temperature – above limit value
P056000Terminal 30 power supply – signal implausible
P056300Supply voltage too high
P060100Function restriction
P060400Control unit - function restriction
P060600Control unit defective
P062F00Function restriction
P064F00Coding

All 198 codes of this control unit →

Fault names come from the manufacturer's diagnostic data. STEUER14 is independent and not affiliated with Porsche AG. A code tells you what a control unit detected, not always which part failed — check wiring, supply voltage and related codes before replacing parts. STEUER14 shows each fault's full description, status and freeze frame on the car.