Home › Fault codes › P0B3700
P0B3700 — High Voltage Service Disconnect Open
High Voltage Service Disconnect Open. 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 P0B3700
How to read and clear P0B3700
- Plug a standard ENET (Ethernet-to-OBD) cable into your Porsche's OBD port and your Mac or Windows PC.
- Open STEUER14, pick your car and run a fault scan: every control unit is read, and P0B3700 shows with its status, its full description and the freeze frame when the unit stores one.
- 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 readingOther codes of the Battery Energy Control Module
| P0B1B00 | Hybrid/EV Battery Pack Voltage Sense "C" Circuit Low |
| P0B1C00 | Hybrid/EV Battery Pack Voltage Sense "C" Circuit High |
| P0B3300 | High-voltage battery voltage supply – below limit value |
| P0B3400 | High Voltage Service Disconnect Circuit, Performance |
| P0B3500 | High Voltage Service Disconnect Circuit Low |
| P0B3600 | High Voltage Service Disconnect Circuit High |
| P0B3C00 | Hybrid/EV Battery Voltage Sense "A" Circuit, Range/Performance |
| P0B3D00 | Hybrid/high-voltage battery voltage, sensor line 1, short circuit to ground |
| P0B3E00 | Hybrid/high-voltage battery voltage, sensor line 1, short circuit to B+ |
| P0BBD00 | Hybrid Battery Pack Voltage Variation Exceeded Limit |
| P0C4300 | Temperature sensor for low-temperature circuit (TME: TW7 / BMS: HV battery input) – signal implausible |
| P0C4400 | Temperature sensor for low-temperature circuit (TME: TW7 / BMS: HV battery input), short circuit to ground |
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.