P06A1Variable A/C Compressor Control Circuit Low
- Generic OBD-II code · Powertrain
- How the car detects it
- Variable-displacement A/C compressors change their swash-plate stroke via an electric control valve: a PWM current sets the crankcase pressure and thus the output. Where the engine module drives this valve (Ford's 'EVDC' compressors 2013–2019), it monitors the circuit; where the climate control module drives it (Hyundai, VW/Audi, GM), faults appear in that module instead. CARB requires monitoring only where the A/C affects engine control. P06A1 means the control valve circuit is too low – a short to ground, or the driver sees ground potential with the output off; shorted coil turns are another cause. No manufacturer document available to us names P06A1 itself; the description follows P06A0 and the Ford EVDC system. The compressor then delivers no controlled output.
- What you may notice
- A/C cools weakly or not at all
- Code stored
- Likely causes
- LikelyValve control wire shorted to ground (chafing at compressor or engine)
- PossibleShorted turns in the control valve
- PossibleMoisture or corrosion in the compressor connector
- RareEngine module driver faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €30 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.