What it means
Supply voltage to fuel volume regulator solenoid below expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
- The engine or gearbox may go into limp mode
How it works
The fuel volume regulator solenoid meters fuel supply, and its monitored supply-voltage circuit must receive adequate power. P00CC sets when the control module detects that supply below its expected range, which may reflect a failed feed or excessive resistance in a connection or wire.
Common causes
Most likely first.
- Supply fuse blown or relay failed
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Symptoms
- Check engine light on
- Hard starting or extended cranking
- Engine may stall or run roughly
- Reduced power or hesitation
How to diagnose it
- Record freeze-frame data and check related fuel-pressure codes to understand when the low supply occurred.
- Inspect the fuel volume regulator connector and harness for corrosion, loose pins, chafing or heat damage.
- Check the relevant fuse and relay and look for a weak or interrupted supply.
- Measure voltage at the regulator supply circuit under the conditions specified by the manufacturer and compare it with the manufacturer's specification.
- Check voltage drop and continuity along the supply path, then test the solenoid and control circuit using the manufacturer's procedure.
Common fixes
- Clean and secure a corroded or loose regulator connector.
- Repair damaged or chafed supply wiring.
- Replace a failed fuse or relay after correcting its cause.
- Repair a high-resistance terminal or connection confirmed by testing.
- Replace the fuel volume regulator solenoid only if testing confirms it is faulty.
Can I keep driving?
Avoid hard acceleration and driving where an unexpected stall would be dangerous; low supply voltage can lead to hesitation, reduced power or stalling. If the engine repeatedly stalls or will not start, stop driving until the fault is repaired.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.