Home › Fault codes › P0A9C00
P0A9C00 — Hybrid Battery Temperature Sensor "A" Circuit Range/Performance
Hybrid Battery Temperature Sensor "A" Circuit Range/Performance. 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 P0A9C00
How to read and clear P0A9C00
- 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 P0A9C00 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
| P0A0A00 | High Voltage System Inter-Lock Circuit |
| P0A0C00 | High Voltage System Interlock Circuit Low |
| P0A0D00 | High Voltage System Interlock Circuit High |
| P0A1F00 | Terminal 30 power supply – signal implausible |
| P0A7F00 | Hybrid/EV Battery Pack Deterioration |
| P0A9500 | High Voltage Fuse |
| P0A9D00 | Temperature sensor 1 for hybrid/high-voltage battery - short circuit to ground |
| P0A9E00 | Temperature sensor 1 for hybrid/high-voltage battery - short circuit to B+ |
| P0AA100 | Hybrid/EV Battery Positive Contactor Circuit, Stuck Closed |
| P0AA200 | Hybrid/EV Battery Positive Contactor Circuit, Stuck Open |
| P0AA400 | Hybrid/EV Battery Negative Contactor Circuit Stuck Closed |
| P0AA500 | Hybrid/EV Battery Negative Contactor Circuit Stuck Open |
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.