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B149717 — Rear A/C Control Head 4, voltage too high

Rear A/C Control Head 4, voltage too high. 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 B149717

Porsche Taycan

Central Electrics

Porsche 911 (992)

BCM1 (Body Control Module 1)

Porsche Panamera (971, 2017–2023)

BCM1 (Body Control Module 1)

Porsche Panamera (972, 2024–)

BCM1 (Body Control Module 1)

Porsche Cayenne (9YA)

BCM1 (Body Control Module 1)

How to read and clear B149717

  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 B149717 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 →

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Other codes of the Central Electrics

B149616Rear A/C Control Head 3, Voltage too low
B149617Rear A/C Control Head 3, voltage too high
B1496F0Rear A/C Control Head 3, Hardware coding, electrical malfunction
B1496F1Rear A/C Control Head 3, Button signal implausible
B149704Front A/C display control head 4, Faulty
B149716Rear A/C Control Head 4, Voltage too low
B1497F0Rear A/C Control Head 4, Hardware coding, electrical malfunction
B1497F1Rear A/C Control Head 4, Button signal implausible
B149804Front A/C display control head 5, Faulty
B149816Rear A/C Control Head 5, Voltage too low
B149817Rear A/C Control Head 5, voltage too high
B1498F0Rear A/C Control Head 5, Hardware coding, electrical malfunction

All 1472 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.