P0002: Fuel Volume Regulator A Control Circuit Range/Performance
Do not keep driving
Driveability will usually be noticeably poor. Have the fuel pressure measured against what the module is commanding before any part is replaced.
What this code means
The regulator circuit is electrically intact, but the regulator is not doing what it is told — commanded and actual rail pressure disagree by more than the module tolerates. Because this is a performance rather than a circuit code, the fault is as likely to be mechanical as electrical: a sticking regulator spool, a worn pump, or a restriction upstream that prevents the pump from ever reaching the commanded pressure.
Likely causes
Start here
- Failed fuel volume regulator · moderate
- Worn high pressure fuel pump · specialist
- Restricted fuel filter · easy
Less common
- Weak low pressure lift pump · moderate
- Intermittent wiring fault · moderate
- Faulty fuel rail pressure sensor · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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