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B16A285 — Refrigerant circuit for passenger compartment cooling – pressure too high
Refrigerant circuit for passenger compartment cooling – pressure 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 B16A285
How to read and clear B16A285
- 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 B16A285 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 Thermal Management
| B16A112 | Refrigerant circuit shutoff valve (AVK8) – short circuit to B+ |
| B16A113 | Refrigerant circuit shut-off valve (AVK8) – open circuit |
| B16A119 | Refrigerant circuit shut-off valve (AVK8) – current too high |
| B16A14B | Refrigerant circuit shut-off valve (AVK8) – temperature too high |
| B16A1F0 | Evaporator for passenger compartment - iced up |
| B16A284 | Refrigerant circuit for passenger compartment cooling – pressure too low |
| B16A384 | Refrigerant circuit heat pump operation – pressure too low |
| B16A385 | Refrigerant circuit heat pump operation – pressure too high |
| B182C04 | Electric interior heater (Z189), internal error |
| B182C16 | Electric interior heater (Z189), 12V electronics, voltage too low |
| B182C17 | Electric interior heater (Z189), 12V electronics – voltage too high |
| B182C29 | Electric interior heater (Z189), signal implausible |
All 636 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.