P2373: Fuel Volume Regulator B Control Circuit High
What to do
As P2370's family — and mention any companion rail-pressure codes, because they say which way the stuck command is pushing.
What this code means
The B regulator's control circuit reads high — shorted to a supply, or open in a circuit that rests high. The mirror of P2372, with one wrinkle worth knowing: a line stuck in the driven state holds the valve at whatever the stuck command demands, which can mean rail pressure pinned high or starved depending on the valve's sense. The companion rail-pressure codes name the direction; the wiring names the cause.
Likely causes
Start here
- Wiring shorted to voltage · moderate
- Open circuit in actuator wiring · moderate
Less common
- Control module driver failure · specialist
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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