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B1A9201 — High-voltage AC current sensor, power correction 2 phase 2, Electrical malfunction
High-voltage AC current sensor, power correction 2 phase 2, Electrical malfunction. The Taycan, 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 B1A9201
How to read and clear B1A9201
- 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 B1A9201 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 On-Board Charger
| B1A8F04 | LED module for left charge port door – defective |
| B1A8F96 | LED module on left charge port door, internal error |
| B1A8FF0 | LED module for left charge port door, communication error |
| B1A8FF1 | Left charge port door LED module – anti-play prevention active |
| B1A8FF2 | LED module for left charge port door – overvoltage |
| B1A8FF3 | LED module for left charge port door – undervoltage |
| B1A9301 | High-voltage AC current sensor, power correction 2 phase 3, Electrical malfunction |
| B1A9401 | High-voltage AC current sensor, power correction 2 phase 1, Electrical malfunction |
| B1AA5F0 | High-voltage charger 2 - component protection active |
| B1AD100 | Control unit – function restriction |
| B1B3804 | Left charge port door, sensor for contactless opening – defective |
| B1B38F0 | Left charge port door, sensor for contactless opening – communication error |
All 221 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.