Alternative fuel vehicles have been increasing in popularity around the globe as people become more aware of the environmental impact of traditional gas-fueled cars. Federal regulations mandate that the latest ones need to be equipped with an On-Board Diagnostics II (OBD-II) system which allows owners and mechanics to monitor the performance of these vehicles. Such a system can identify problems in the car, and most importantly, it can produce a specific code that a trained mechanic can use to pinpoint the issue. In this article, we are going to explore one of these codes in greater detail, namely OBD-II Code P2A72 – Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Low.
Overview of OBD-II Code P2A72
When the OBD-II system detects a problem with the fuel pump system, it will store a code in the module’s memory. One of these codes is P2A72, which refers to an Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Low. The code indicates that the voltage supplied to the fuel pump select valve circuit is lower than what is expected by the car’s computer. This code sets off the ‘check engine’ light and means that the fuel pump select valve is not functioning correctly.
Symptoms of OBD-II Code P2A72
When this code appears, you may start to notice several common symptoms:
1. Check Engine Light: In most cases, the check engine light will be illuminated, indicating that there is an error with the fuel pump system.
2. Poor Fuel Efficiency: The system may be unable to regulate the rate at which fuel is being consumed, leading to a loss in fuel economy.
3. Rough Running: You may start to notice your vehicle sputtering or having trouble accelerating.
4. Hard Starting: If your vehicle is struggling to start, then it could be due to the valve not functioning correctly.
Causes of OBD-II Code P2A72
Many factors can cause this code to appear on your vehicle’s OBD-II system. Some of the most common are:
1. Corrosion: Over time, corrosion can develop around the valve, creating an electrical connection problem that can cause the voltage on the valve’s circuit to drop.
2. Wiring Issues: The valve can be wired incorrectly or suffer from damaged wiring, leading to low voltage to the valve.
3. Valve Failure: The valve itself can fail due to wear and tear or due to a malfunctioning electrical connection.
4. Fuel System Issues: Other parts in the fuel system such as the fuel pump, fuel injectors, or fuel filter could be causing the issues.
How to Repair OBD-II Code P2A72
Once you’ve identified the underlying cause of the OBD-II code P2A72, you can begin to develop a plan for repairing the issue. In general, you should follow the below steps:
1. Inspect Wires: Inspect the wiring associated with the valve for any damage or disconnections and repair them if possible.
2. Check Valve: Verify the valve’s resistance and correct voltage and replace any malfunctioning valve.
3. Inspect Fuel System: Check other parts of the fuel system if the valve does not appear to be malfunctioning.
4. Clear the Code: After fixing the issue, clear the code from the OBD-II system, and make sure that your check engine light goes off.
Frequently Asked Questions (FAQs)
1. What is OBD-II Code P2A72?
OBD-II code P2A72 is Alternative Fuel Hydraulic Fuel Pump Select Valve Control Circuit Low. This code indicates a problem with the voltage supplied to the fuel pump select valve circuit, leading to the valve not functioning correctly.
2. What causes OBD-II Code P2A72?
Corrosion, wiring issues, valve failure, and fuel system issues are the leading causes of OBD-II Code P2A72.
3. What are the symptoms of OBD-II Code P2A72?
The symptoms of OBD-II Code P2A72 include the check engine light turning on, poor fuel efficiency, rough running, and hard starting.
4. How do I repair OBD-II Code P2A72?
You should inspect wires, check the valve, inspect the fuel system, and clear the code from the OBD-II system.
5. Do I need a mechanic to repair OBD-II Code P2A72?
While it is possible to repair this issue independently by following the above steps, it is usually best to consult with a qualified mechanic to ensure that the problem is diagnosed and repaired correctly.
Conclusion
OBD-II Code P2A72 is a specific code that can identify problems with the fuel pump select valve circuit in alternative fuel vehicles. By understanding the code’s symptoms and causes, you can work with a professional mechanic to diagnose and repair the issue. With the proper steps, you can fix the underlying issue and clear the code from your vehicle’s OBD-II system. It is always important to consult with a qualified mechanic to ensure that the problem is correctly diagnosed and fixed.
20% off Additional Services at Valvoline Instant Oil Change
20% off Cabin Air Filter Replacement at Valvoline Instant Oil Change
