Guide To P255F OBD Error Code Solutions

<<See All OBD Codes    

This code is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system, especially those made from 1996 up to present. It’s also more common among Audi, Citroen, Chevrolet, Ford, Hyundai, Nissan, Peugeot, and Volkswagen vehicles. Specifications on the definition, troubleshooting, and repairs, of course, vary from one make and model, powertrain configuration type, to another.One thing which you must keep in mind that its symptoms as well as causes would surely vary as it depends upon a number of things.OBD code P255F means A/C Request "A" Circuit Range/Performance Issue.

When your vehicle’s computer sets this code, it means that a problem has been detected in the signal sent to the PCM (powertrain control module) from the air conditioning refrigerant pressure sensor.

Signals received by the PCM are interpreted as voltage readings in order to make it easier for the computer to detect a problem. If there are fluctuations in air conditioning system pressure, the PCM gets the message via voltage fluctuations, telling it that the system is producing either too much or too little pressure.

What causes this problem with A/C Request "A" Circuit Range/Performance?

• Excessive pressure in the system
• A faulty A/C refrigerant pressure switch or sensor (there may be up to four, depending upon make and model)
• A short or open in the system circuitry
• Poor electrical connections in the wiring and connectors
• A bad climate control head
• A loose or damaged connector

1. Engine Control Module - It is not always the components, but the ECM that can also be faulty. It can cause misinterpretation of correct data thus leading to wrong operational decisions which will affect the transmission and overall engine performance. Thus, replace faulty module and reprogram it now!
2. Powertrain Control Module - Powertrain Control Module can also be faulty in rare cases and thus needs through checks for system and software errors. Thus, check and replace it, if required.
3. Electronic Control Unit - The ECU manages the cooling system to control the battery operating temperatures and thus must be replaced, if found faulty. Thus, buy new ECU modules and components from us!
4. Diagnostic Tool - Make use of quality diagnostic tools to resolve any OBD error code. Buy quality diagnostic tools from us!
5. Air Conditioning Compressor - If the condenser does appear to be running, but the system is blowing warm air, that's also a symptom of AC compressor failure about to happen. As the system loses refrigerant charge, it causes strain on the compressor, so refrigerant leaks can cause your compressor to fail. Thus, replace it in time.
6. Condenser - The AC condenser is a very important component found on virtually all modern automotive AC systems. Its primary function is to convert the refrigerant coming from the compressor from a high temperature, high pressure vapor into a high-pressure liquid through condensation. Thus, check faulty condenser and replace it in time.

Next important thing you need to know about are the common symptoms for this obd error code P255F with your fuel volume control.

Common Symptoms

• Illuminated malfunction indicator light (MIL)
• Stored OBD trouble code
• Air conditioning may not work
• Bad air conditioning switch
• Hot air from the blower

Once you know the symptoms of your vehicle’s problem, it becomes easy to detect it and get started with solving it. So, next on our list is few common steps to correct this issue with your vehicle.

• Replacing shorted, open, or damaged wiring or connectors
• Replacing the A/C refrigerant pressure sensor(s)
• Replacing the high-pressure switch
• Repairing any leaks in the system
• Replacing the A/C compressor switch
• Adding refrigerant
• Replacing the climate control head

However, if you face any issue then we have stocked a wide range of best priced PCM, A/C Compressor, A/C System, Pressure Sensor and more to help you out in fixing your car.

If you want to easily diagnose this fault P255F code, then all you have to do is to follow the steps which are mentioned below:

• Read the vehicle’s computer with an OBD-II scanner to check for any other existing trouble codes and to record freeze frame data.
• Clear out the DTCs and test driving the vehicle to see if they return (to diagnose an intermittent condition).
• Diagnose and repair any problems which occurred before the A/C code.
• Visually inspect the A/C pressure sensor(s) and related wiring and connectors for damage or dirty faces.
• Test the voltage and ground signals at the low-pressure switch connector.
• Use a pressure gauge to measure the refrigerant pressure (to verify that it’s above 29 psi but below 275 to 300 psi).
• Observe the electric condenser fan during operation (if equipped).
• Check for a refrigerant leak and replace the faulty component.

Common Mistakes When Diagnosing the P255F Code

Refrigerant should not be added without verifying that the system is not overfilled. This can result in catastrophic system damage. The system should be thoroughly diagnosed, and both low pressure gauge and high-pressure gauge readings observed to ensure the correct amount of pressure is moving through the system.