Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the electrical circuit that controls a valve in the fuel system of a car that uses alternative fuel. It's like a light switch that isn't working correctly.
The P2A73 code is triggered when the Engine Control Module (ECM) detects a high voltage condition in the control circuit for the hydraulic fuel pump select valve in an alternative fuel system.
The P2A73 code indicates that there is an issue with the electrical circuit responsible for controlling the hydraulic fuel pump select valve in vehicles that run on alternative fuels. This could be due to a short circuit, open circuit, or a failed component causing the voltage to be higher than expected.
• Check Engine Light is on
• Poor fuel efficiency
• Reduced engine performance
• Faulty hydraulic fuel pump select valve
• Wiring issues such as short circuits or open circuits
• Faulty ECM (Engine Control Module)
ECM: Engine Control Module, the computer that controls the engine's functions.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the hydraulic fuel pump select valve for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty hydraulic fuel pump select valve.
• Reprogram or replace the ECM if necessary.
• OBD-II Scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Nissan Leaf
• Regular maintenance of the fuel system
• Periodic inspection of wiring and connectors
• Timely replacement of faulty components
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on the fuel system components.
This code is relatively rare and specific to vehicles using alternative fuels, reflecting the complexity of modern fuel systems.
Moderate – It is important to address this issue to avoid potential fuel system damage.
Driving with this code may lead to reduced performance and efficiency, and it is advisable to repair it promptly to comply with emissions regulations.
• Engine running
• Alternative fuel system active
The hydraulic fuel pump select valve is typically located near the fuel tank or along the fuel lines in the vehicle.
Q: Can I drive my car with a P2A73 code?
A: It's not recommended to drive with this code as it can lead to reduced performance and potential damage to the fuel system.
Q: How can I reset the P2A73 code?
A: After fixing the issue, you can use an OBD-II scanner to clear the code from the ECM.
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