P2516 OBD Error Code: Problem & Solutions

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The trouble code P2516 can be elucidated as A/C Refrigerant Pressure Sensor "B" Circuit Range/Performance. 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.

The A/C refrigerant pressure sensor is a pressure transducer, which converts the refrigerant system pressure to analogy electrical signal to allow for inspecting by the automobile's modules. Generally, this is done by utilizing 3 wires: a 5-volt reference wire, signal wire and a ground wire. The modules compare the signal wire's values to the 5-volt reference, and then would be able to instantly calculate system pressures with this information.

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

• There can be inoperative A/C refrigerant pressure sensor
• Leakage in the A/C refrigerant pressure sensor
• The refrigerant pressures/refrigerant level might not be correct
• Unusable wire(s) (open, short to +, short to -, etc.)
• Defective connector
• Quirks in the ECC (Electronic Climate Control) or BCM (Body Control Module) issue
• Inferior connections

1. A/C Compressor -The main function of the A/C compressor is to pressurize the AC system and then keeping the refrigerant flowing so it can work properly. This auto part functions in a continuous cycle on and off and that is the reason why it can wear every time the AC is turned on. Due to that it can eventually fail and then there might be a need to replace it. We have best A/C compressor with us.
2. Engine Control Module - Most of the time it is difficult to intercept the ECM faults and thus must be checked for thoroughly. There can be a problem with the circuit or the software might have malfunctioned. Thus repair, replace or reprogram the component as per requirement.
3. Powertrain Control Module - If the PCM is faulty, it can store wrong OBD codes and can lead to misdiagnosis. This can happen due to misinterpretation of data received from the various sensors and components which also affects the vehicle’s performance. Thus, replace it immediately.
4. Electronic Control Unit - If the ECU is at fault, it will not be able to read the boost converter temperatures correctly leading to underperformance. Thus, replace faulty ECU now!
5. Diagnostic Tool - Choose from our diagnostic tools collection that will come in handy to detect and correct the OBD error code.

You might be thinking that how would you diagnose these problems? We at Parts Avatar Canada would help you diagnose the major symptoms easily.

Common Symptoms

• The service engine soon light can start lighting up
• Incorrect temperatures coming from fan air
• Bounded HVAC use
• Fan air temperature inconsistent/fluctuating
• A/C compressor might not engage
• 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 electrical connectors
• Make sure to mend the faulty control head
• It is essential to restore the flawed A/C refrigerant pressure sensor
• The malfunctioning wiring and connectors should be repaired or replaced as per the need
• Carefully adjust the faults in the refrigerant
• Recondition the non-functioning A/C refrigerant pressure switch

There is no need to get strained if your OBD Code is still flashing up as we are here at your service. Have a look at our superior variety of PCM, ECM, A/C refrigerant connector, A/C compressor, A/C manifold gauge set, a c refrigerant pressure switch, a c refrigerant pressure sensor, powertrain control module, car air conditioner compressor, car ac refrigerant and many more. Now all your problems would vanish within no time.

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

• It is essential 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.
• 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 a 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.
• 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 vary 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.
• 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 P2516 Code

• There can be some faults in the powertrain control module
• Negligence in the A/C pressure sensor
• Wiring problems