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 found a problem with the electrical circuit that controls a valve in the alternative fuel tank. It's like a switch that isn't working properly.
The P2A22 code is triggered when the Engine Control Module (ECM) detects an open or malfunction in the control circuit for the alternative fuel tank shutoff valve B.
The alternative fuel tank shutoff valve B is part of the vehicle's fuel system, responsible for controlling the flow of alternative fuel. An open circuit or fault in this control circuit can prevent proper operation of the valve, affecting fuel delivery and system performance.
• Check Engine Light is on
• Poor fuel efficiency
• Possible fuel odor
• Faulty shutoff valve B
• Open or shorted wiring in the control circuit
• Faulty ECM
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.
• Test the shutoff valve B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty shutoff valve B.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Toyota Prius
• Honda Civic Hybrid
• Chevrolet Volt
• Regularly inspect fuel system components.
• Ensure proper maintenance of electrical connections.
• Use quality fuel to prevent contamination.
Sensor Issue
• Avoid driving with a full alternative fuel tank until repaired.
• Seek professional diagnosis to prevent further issues.
Check with your vehicle manufacturer for possible warranty coverage on emissions-related components.
This code is less common and typically associated with vehicles using alternative fuel systems.
Moderate – Addressing this code promptly can prevent fuel system issues.
Ignoring this code may lead to increased emissions and potential safety hazards.
• Vehicle must be running.
• Alternative fuel system must be active.
The alternative fuel tank shutoff valve B is usually located near the alternative fuel tank, often under the vehicle.
Q: Can I drive with a P2A22 code?
A: It's possible to drive, but it's not recommended as it can lead to fuel system issues.
Q: How can I reset the P2A22 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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