P06A1
Variable A/C Compressor Control Circuit Low
A/C compressor control
Generic OBD-II
Low
What it means
P06A1 means the control module detected low voltage or a short to ground on the circuit that operates the variable-displacement A/C compressor's control valve. That valve sets how much the compressor pumps, so a fault here affects air-conditioning cooling only — the engine and drivetrain are unaffected.
Low
Can I keep driving? Safe to drive — this is an air-conditioning control-circuit fault; it affects A/C cooling, not the engine, and poses no safety risk.
Common symptoms
What you'll notice
- Weak or no air-conditioning cooling
- A/C compressor not engaging or running at the wrong output
- Check-engine light on
Common causes
Most likely first
- Short to ground or low voltage in the compressor control-valve circuit wiringLikely
- Faulty variable-displacement A/C compressor control valve (solenoid)Common
- Corroded or loose connector at the compressor control valveCommon
- Faulty ECM/PCM control driverLess often
How to diagnose & fix
Work through it in order
- Scan and read freeze-frame data to confirm the fault.
- Inspect the control-valve wiring and connector for a short to ground or corrosion.
- Measure the control circuit and the valve's resistance; compare to spec.
- Test or replace the compressor control valve if it's out of range.
- Only after wiring and valve check out, consider the ECM/PCM driver. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P06A1?+
Yes. It only affects the air-conditioning system, not the engine or safety. Your A/C may just cool poorly or not at all.
Can I just clear P06A1?+
It returns until the compressor control circuit or valve is repaired. Clearing won't restore A/C cooling.
Related codes
Often seen with P06A1
Read & clear P06A1 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX