Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble talking to a part that helps control the fuel pump for alternative fuels. It's like when your remote control sometimes doesn't work right with the TV.
This code indicates that the control circuit for the hydraulic fuel pump select valve, which is used in vehicles with alternative fuel systems, is experiencing intermittent or erratic signals.
The P2A74 code is triggered when the Engine Control Module (ECM) detects an intermittent or erratic signal in the control circuit of the hydraulic fuel pump select valve. This valve is responsible for managing the flow of alternative fuels in vehicles designed to use such fuels. An erratic signal can lead to improper fuel delivery and potentially affect engine performance.
• Check Engine Light is on
• Poor fuel efficiency
• Engine performance issues
• Faulty hydraulic fuel pump select valve
• Wiring issues, such as damaged or corroded wires
• Malfunctioning ECM or control module
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• 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.
• Replace or repair damaged wiring or connectors.
• Replace the hydraulic fuel pump select valve if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regular maintenance of the fuel system
• Periodic inspection of wiring and connectors
• Ensure proper fuel quality
Circuit Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
• Keep up with regular maintenance to prevent future occurrences.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code is relatively rare and typically associated with vehicles using alternative fuel systems.
Moderate – While the vehicle may still be operational, it's important to address the issue to prevent potential engine damage.
Driving with a malfunctioning fuel system can lead to increased emissions and may not comply with environmental regulations.
• Engine running
• Alternative fuel system engaged
The hydraulic fuel pump select valve is typically located near the fuel tank or along the fuel line in vehicles with alternative fuel systems.
Q: Can I drive with a P2A74 code?
A: It's possible to drive for a short period, but it's best to have it checked soon to avoid potential engine damage.
Q: Is this code specific to hybrid vehicles?
A: Yes, this code is more common in vehicles that use alternative fuel systems, such as hybrids or those with dual-fuel capabilities.
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