P06A1 OBD Error Code: Problem & Solutions

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The air conditioner compressor control circuit of vehicles performs the function of maintaining the temperature in the vehicle cabin as per the requirement of the driver. It does so, by engaging and disengaging the compressor at the right time. The Electronic Control module receives voltage signals from different components and this helps it detect any potential malfunctions in the system. For this process to be accomplished, the A/C compressor control circuit incorporates several components. Newer vehicles now come with a climate control that helps this circuit function properly. The error code P06A1 is set when the Engine Control Unit detects abnormally low electrical signals within the variable A/C compressor control circuit. The ‘check engine’ light will also be lit.

The A/C compressor is controlled by the Powertrain control module/ PCM. The error code P06A1 is set when the PCM is not able to control the voltage going to the A/C compressor.

What causes this problem with the Variable A/C Compressor Control Circuit Low?

• Defect found in the A/C compressor
• Defect in the air conditioner solenoid
• System is low or overcharged
• Clog in the orifice tube or dryer
• Faulty climate control
• Defect in the air conditioner relay, blown fuse or fusible link
• Corrosion or damages of the connector
• Damaged or faulty wiring
• Defect in the ECU

1. A/C Compressor - Buy a new one easily from Parts Avatar and be sure of the quality.
2. A/C Solenoid - Repair all malfunctioning bits or replace if needed.
3. Orifice Tube/Dryer - Any damages to the tube have to be repaired properly, otherwise replace with a new one.
4. A/C Relay - You mechanic will inform you if repairing will suffice, otherwise you will have to replace it.
5. Engine Control Unit - Try to repair the damaged, if not simply purchase from us, we offer free shipping on orders over CAD $99.
6. A/C Diagnostic Machine - Fix the issues, otherwise purchase a new one.
7. Multimeter - See if you can repair it, if that doesn’t resolve the issue you will have to opt for replacement.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P06A1 here:

Common Symptoms

• Air conditioner will not function as usual
• Illuminated ‘check engine light

Want to correct the Trouble Code P06A1? Read these points mentioned below:

• Replace the A/C compressor with a new one
• Replace the A/C solenoid
• Replacement of orifice tube or dryer
• Replacement of any blown fuses or fusible link
• Repairing any leaks in the A/C system
• Cleaning any dirt or corrosion from all related connectors
• Repairing or replacing faulty wiring as per need and damage
• Evacuating and recharging system through a professional
• Flash or replace the ECU via a trained mechanic 

Parts Avatar Canada is here to solve all your issues related to car parts. We have stocked a wide range of best priced A/C Compressor, A/C Solenoid, Orifice Tube/Dryer, A/C Relay, Blown Fuse, Fuse-Able Link, Engine Control Unit, A/C Diagnostic Machine, Multimeter and a lot more to help you out in fixing your car.

It is essential to diagnose this fault code. Here are some steps which a mechanic should follow for diagnosing the problem that triggered a P06A1 code to be stored:

• Start off by increasing your knowledge base, and having plenty information handy. Simply get hold of your vehicles TSB. This will also save you a lot of time and energy while diagnosing.
• Locate all components within this circuit and start performing a visual inspection. Check all associated wirings and look for any scraping, rubbing, burn spots, or bare wires etc. Once, you’re done with that, check the connectors for security, damaged pins or corrosion. Run this inspection on the /C compressor, associated sensors, relays and the ECU for sure.
• Now we are moving into the advanced steps of diagnosis, for this it is extremely important that your vehicle specific information from your manufacturer's TSB. You will require a digital multimeter, and also an A/C diagnostic machine. This equipment is important to be able to zero in on the main source of malfunction, by discovering any leaks and verifying appropriate pressures within the system.
• Your vehicle's high and low side gauges will also help in validating how well the A/C compressor and its associated components are functioning. Any restrictions caused due to clogging of the orifice tube or dryer will also be identified correctly. Another key component responsible for the circuit to function will is the amount of refrigerant in the system. And the damages are prevented by the involvement of safety switches, fuses and fusible links.
• To determine voltage ranges, refer the troubleshooting guidelines mentioned in your vehicles manual. These will be different for the different A/C components. Depending on the configuration of your vehicle, different components are incorporated, these include A/C compressor, relays and solenoids. Some of the newer automobiles have climate controls that can make troubleshooting rather complicated. The voltage requirements also vary from vehicle to vehicle.
• During this process if you identify that there’s an absence of a power source or ground, more testing will be required, in order to check the quality of the wires, connectors and other related components. These continuity tests should be performed after removal of power from the circuit and the readings on the wire should show 0 Ohms resistance. You will have to repair/replace any shorted or open wires, which will be indicated by resistance or no continuity during testing.

Common Mistakes When Diagnosing the P06A1 Code

• A/C compressor has failed
• A/C compressor relay has failed
• Pailed Powertrain Control Module (PCM)
• Problematic wiring