Fault Family System: Powertrain (P-Codes) 12 SAE Codes

Fuel Volume Regulator Circuit

Diagnostic & Technical Explanation

Code P0001 (Fuel Volume Regulator A Control Circuit/Open) sets when the ECM cannot drive or verify the fuel volume regulator (metering solenoid) that meters fuel into a high-pressure common-rail or GDI pump — the commanded duty cycle produces a circuit open, out-of-range current, or a learned trim value pinned against its adaptation limit. Root causes are a failed regulator coil, oxidized connector pins, chafed harness conductors, or a mechanically sticking metering valve caused by fuel contamination.

These 12 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 12 times.

Codes in this family (12)

Code	Definition	Repair coverage
P0001	Fuel Volume Regulator A Control Circuit/Open	4 ranked fixes
P0002	Fuel Volume Regulator A Control Circuit Performance	4 ranked fixes
P0003	Fuel Volume Regulator A Control Circuit Low	4 ranked fixes
P0004	Fuel Volume Regulator A Control Circuit High	4 ranked fixes
P000E	Fuel Volume Regulator Control Exceeded Learning Limit	4 ranked fixes
P00CB	Fuel Volume Regulator Solenoid Supply Voltage Control Circuit/Open	4 ranked fixes
P00CC	Fuel Volume Regulator Solenoid Supply Voltage Control Circuit Low	4 ranked fixes
P00CD	Fuel Volume Regulator Solenoid Supply Voltage Control Circuit High	4 ranked fixes
P2370	Fuel Volume Regulator B Control Circuit/Open	4 ranked fixes
P2371	Fuel Volume Regulator B Control Circuit Performance	4 ranked fixes
P2372	Fuel Volume Regulator B Control Circuit Low	4 ranked fixes
P2373	Fuel Volume Regulator B Control Circuit High	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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