Error Code P2515: What It Means & What To Do?

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The trouble code P2515 can be explicated as A/C Refrigerant Pressure Sensor "B" Circuit. If the engine control module would detect a variation in the voltage coming from the refrigerant pressure through the Air Condition (A/C) Pressure Sensor delivered performance that is outside the parameters set by the automobile manufacturer, then it would store the P2515 fault code. This would give rise to the flashing up of the check engine light.

This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model. The engine control module, powertrain control module or the transmission control module monitors this circuit depending upon the particular automobile.

What causes this problem with the A/C Refrigerant Pressure Sensor "B" Circuit?

• The A/C refrigerant pressure sensor might be flawed
• A/C refrigerant pressure sensor might start leaking
• There might be low refrigerant pressures/refrigerant level
• Malfunctioning wire(s) (open, short to +, short to -, etc.)
• Faulty connector
• Some issues related to the ECC (Electronic Climate Control) or BCM (Body Control Module)
• Bad connections

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3. Powertrain Control Module - The PCM makes the engine and transmission work in tandem. Any issue with the powertrain control module will cause major problems with the efficient running of the vehicle.
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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 P2515 here:

Common Symptoms

• Check engine light might come into signal
• Inexact temperatures coming from fan air
• Restricted HVAC use
• Fan air temperature unpredictable/fluctuating
• A/C compressor not engaging when required
• HVAC system operating unusually

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• You must fix the defective A/C refrigerant pressure sensor
• Make sure to mend the faulty refrigerant
• It is essential to restore the flawed A/C refrigerant pressure switch
• Repair or replace the quirky wiring and connectors
• Rehabilitate the defaults in the electrical connectors
• Carefully adjust the faults in the control head

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Here are some steps which you should follow in order to diagnose this fault code:

Make sure to consult your vehicle information source for technical service bulletins (TSB) that replicate the code stored, vehicle (year, make, model, and engine), and symptoms exhibited. If you find the appropriate TSB, it may yield helpful diagnostic information. A diagnostic scanner and a digital volt/ohmmeter will be necessary to accurately diagnose a code P2515. A reliable source of vehicle information will also be needed.

Have a look at Step 1

It totally depends upon the tools/knowledge which you have access to, then you should check the A/C refrigerant pressure sensors operation. There are basically 2 easy ways with which this can be done. 1. It depends upon your OBD reader/scan tool's abilities and limitations, then you should inspect refrigerant pressures and other desired values while system is operating to verify the sensor's functionality. 2. If you have an A/C manifold gauge set, then you can easily monitor the pressures mechanically and compare pressures with the specifications set by the manufacturer.

Here is a tip for you. If you don’t have any experience with refrigerant, then it is recommended not to dive into pressure testing so make sure you aren't in over your head here, keep in mind that refrigerant is a hazard to the nature, so one should not mess around with it.

Have a look at Step 2

Check the A/C refrigerant pressure sensor. Many a times this sensor is a 3-wire pressure transducer. Checking it will involve testing between the pins and recording your findings. The desired values of this test varies a meaningful amount between manufacturers, temperatures, type of sensor etc, so make sure your info is correct.

Just make sure you are using the appropriate test pins along with your multimeter when testing pins/connectors. A defective pin or connector could cause future intermittent hard- to-find electrical gremlins.

Have a look at Step 3

Then the wiring should be inspected. Sometimes these sensors will be mounted on an A/C pressure line or close to a line connection so the harness will be routed accordingly. These sensors get defective by moving parts under the hood because they might not be secured correctly. Just make sure the sensor looks well physically and the line is fastened adequately.

Common Mistakes When Diagnosing The P2515 Code

• Flaws in the A/C pressure sensor
• There can be some issues in the powertrain control module
• Failure in the car wiring