What this code means

The fuel rail depressurization valve used during service or fuel system shutdown is stuck, causing either a fuel pressure leak-down or inability to relieve pressure.

Symptoms

• Extended cranking after sitting (valve stuck open)
• Service hazard if valve stuck closed
• Fuel pressure drops overnight
• Hard hot restart
• Fuel rail holds pressure excessively long during service

Common causes

• Valve internal seal wear
• Valve solenoid failure
• Debris holding valve open
• Corrosion on valve seat
• Wiring fault preventing valve operation

Diagnostic steps

1. Monitor fuel rail pressure decay after shutdown
2. Test valve solenoid operation
3. Measure pressure hold time vs specification
4. Inspect valve for debris or corrosion
5. Command valve during service procedure

Repair notes

Replace depressurization valve. If pressure leak-down is the issue, also check fuel injector sealing. Always relieve fuel pressure safely before GDI service.

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