P00CC

Code

Generic P — Powertrain

Fuel Volume Regulator Solenoid Supply Voltage Control Circuit Low

Brand: Generic

Type: P — Powertrain

Views: UK: 17 EN: 30 RU: 43

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Page language: EN

Causes

Blown fuse or faulty power relay for fuel system
Poor battery or charging system voltage (low battery/alternator output)
Open, corroded or damaged wiring/harness or connector at the FVR solenoid
Short to ground on the solenoid supply circuit
Failed fuel volume regulator solenoid (internal short/open)
Poor ground at chassis/engine or PCM ground point

Symptoms

MIL illuminated (Check Engine Light)
Hard start, rough idle or stalling
Reduced engine power or poor throttle response
Erratic or incorrect fuel pressure/rail control and changes in fuel trim
Reduced fuel economy
Possible limp-home mode depending on vehicle

What to check

Read and record freeze-frame and related codes with a scan tool; check for pending or related codes
Perform visual inspection of wiring and connector at the FVR solenoid for corrosion, pin damage, or water intrusion
Check battery resting voltage and charging system output (engine running)
Check fuses and fuel system relays related to the solenoid power feed
Measure supply voltage at the solenoid connector with ignition ON (key ON, engine OFF)
Measure solenoid coil resistance (compare to service spec)

Signal parameters

Power feed (supply) at solenoid connector: approx. battery voltage with ignition ON (~11–14.5 V)
Control signal: typically a PCM-switched ground or PWM; duty cycle varies with commanded fuel volume (0–100%)
Solenoid coil resistance (typical range; check service spec): often low ohms — expect approximately 1–50 Ω depending on design (measure and compare to OEM spec)
If circuit low fault: supply voltage measured at connector may be noticeably below battery voltage (for example

Diagnostic algorithm

Confirm code and note freeze-frame data. Scan for related codes (fuel rail pressure, injector circuits, battery/charging).
Verify battery and charging system (resting voltage and charging volts with engine on). Repair charging/battery issues first.
Visually inspect wiring and connector at the FVR solenoid. Unplug connectors and inspect pins for corrosion, bent pins, overheating, or water intrusion.
Check relevant fuses and relays; replace if blown/faulty. Verify power feed is present at the fuse and present to the harness side.
With ignition ON, measure supply voltage at the solenoid power pin. If low, trace back toward fuse/relay/battery to find the drop. Repair corroded connectors or damaged wiring.
Measure solenoid coil resistance at connector (connector disconnected). If open or shorted outside spec, replace the solenoid.
Reconnect and backprobe the control pin. With engine running or while commanding the regulator via scan tool, monitor the control signal (voltage/PWM) and supply voltage simultaneously to see if the voltage collapses when commanded.
Wiggle test harness and connectors while monitoring to identify intermittent faults.
If wiring and solenoid are good but supply remains low only when commanded, check PCM power outputs and ground integrity. Before replacing PCM, confirm with a known-good wiring harness/bench test or dealer-level diagnostics.
Repair or replace failed components (connector repair, wiring repair, fuse/relay, solenoid). Clear codes and road test to confirm repair. If code returns and all wiring/solenoid check good, consult manufacturer repair procedures for PCM testing or replacement.