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 thinks there's a problem with the valve that controls the alternative fuel tank. It's like a switch that isn't turning on or off properly.
The vehicle's computer has detected that the control circuit for the alternative fuel tank shutoff valve is not working as expected. It might be stuck in the 'off' position.
The P224D code indicates an issue with the control circuit for the alternative fuel tank shutoff valve. This valve is responsible for opening and closing to control the flow of alternative fuel. If the circuit is stuck off, it may not allow fuel to flow when needed.
• Check Engine Light is on
• Poor fuel efficiency
• Vehicle may not switch to alternative fuel
• Faulty alternative fuel tank shutoff valve
• Wiring issues in the control circuit
• Malfunctioning control module
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
Control Module: A computer in the vehicle that controls various functions.
• Inspect the wiring and connectors for damage or corrosion.
• Test the shutoff valve for proper operation.
• Check the control module for fault codes or malfunctions.
• Repair or replace damaged wiring or connectors.
• Replace the faulty shutoff valve.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Honda Civic Hybrid
• Chevrolet Volt
• Regularly inspect and maintain fuel system components.
• Ensure proper electrical connections.
• Use quality fuel to prevent contamination.
Control Circuit Issue
• Avoid driving long distances until the issue is resolved.
• Monitor fuel efficiency and switch to gasoline if necessary.
Check vehicle warranty for coverage on emissions-related components.
This code is relatively uncommon and often associated with hybrid or alternative fuel vehicles.
Moderate – While the vehicle may still operate, efficiency and performance could be affected.
Driving with this code may affect emissions and could lead to failing an emissions test.
• Engine running
• Alternative fuel system engaged
The alternative fuel tank shutoff valve is typically located near the alternative fuel tank, often in the rear of the vehicle.
Q: Can I still drive my car with this code?
A: Yes, but it's best to get it checked soon to avoid potential issues with fuel efficiency.
Q: How can I reset the Check Engine Light?
A: You can use an OBD-II scanner to clear the code, but it may return if the issue isn't fixed.
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