Is it safe to drive with this code?

Driving is typically safe in the short term as this fault primarily affects the air conditioning system rather than core engine functions, though the compressor may not operate correctly. Extended driving is generally acceptable but comfort will be reduced, and addressing the fault promptly is advisable—see our disclaimer for further guidance.

The code itself does not directly impact emissions or safety systems, though an illuminated malfunction indicator lamp at the time of the MOT test may attract scrutiny—what matters is whether the MIL is on during testing; refer to our disclaimer for MOT-specific advice.

Roughly how much does it cost to fix?

Costs can vary widely depending on the underlying cause. Simple wiring repairs or relay replacements may fall into the low two-figure to low three-figure range, while compressor replacement or extensive circuit repairs often sit in the mid to high three-figure bracket. Dealer rates typically exceed independent garage prices, and labour often represents the majority of the expense.

Can a low refrigerant charge cause this code?

In some cases, yes—refrigerant levels can affect pressure readings and compressor operation, which may indirectly influence the control circuit voltage. However, this code more commonly points to an electrical fault rather than a refrigerant issue, so both aspects may need investigation.

Professional mechanic working in workshop

← All fault codes | Electrical & Sensors

P06A2

Powertrain

Variable A/C Compressor Control Circuit High

The engine control module has detected abnormally high voltage in the circuit that controls the variable air conditioning compressor.

garage.co.uk

Need a garage?

Compare quotes from verified UK garages near you.

→

car.co.uk

Sell your car

We specialise in problem cars: warning lights, faults, high mileage. Fair instant offer.

→

trader.co.uk

List your car

Free private listing. Reach thousands of UK buyers, no fees.

→

ⓘ Information only. This page provides general educational information about fault code P06A2. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P06A2 mean?

P06A2 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Variable A/C Compressor Control Circuit High.

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Electrical & Sensors codes

Codes in the Electrical & Sensors category.

P06A2 is one of 4,010 codes in this category. Browse all Electrical & Sensors codes →

What we know about P06A2 specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P06A2.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P06A2 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P069F Throttle Actuator Control Lamp Control Circuit

P06A0 Variable A/C Compressor Control Circuit

P06A1 Variable A/C Compressor Control Circuit Low

P06A3 Sensor Reference Voltage "D" Circuit Open

P06A4 Sensor Reference Voltage "D" Circuit Low

P06A5 Sensor Reference Voltage "D" Circuit High

Other Electrical & Sensors codes

Other fault codes in the same system as P06A2. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

B1257

Air Temperature External Sensor Circuit Short To Ground Detailed guide

B1363

DBPT Circuit Short To Ground Detailed guide

B2100

Ignition Run/Start Input Circuit Performance Detailed guide

C2000

Steering Angle Sensor Not Calibrated Detailed guide

P0030

HO2S Heater Control Circuit (Bank 1 Sensor 1) Detailed guide

P0031

Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P06A2 can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

✎

Help us improve the P06A2 page

Spotted an error, missing detail, or have first-hand experience to add? Tell us, we review every submission.