What are the common causes of P2372?

A short to ground on the fuel volume regulator B control circuit. A failed fuel volume regulator B. An open in the regulator B control wire. Corrosion at the regulator B connector.

Read the fuel volume regulator B command and rail pressure on a scan tool. Test the regulator B control circuit for a short to ground. Check the regulator B connector and wiring. Command the regulator B and watch rail pressure respond. Replace fuel volume regulator B if the circuit tests good. Clear the code and retest.

P2372

Fuel Volume Regulator B Control Circuit Low

System: Ignition and misfire (P code)
Lamp: Check Engine Light
Category: Powertrain - Ignition

What it means

P2372 means Fuel Volume Regulator B Control Circuit Low.

Check these first

A short to ground on the fuel volume regulator B control circuit
A failed fuel volume regulator B
An open in the regulator B control wire
Corrosion at the regulator B connector

What to do next

Read the fuel volume regulator B command and rail pressure on a scan tool
Test the regulator B control circuit for a short to ground
Check the regulator B connector and wiring
Command the regulator B and watch rail pressure respond
Replace fuel volume regulator B if the circuit tests good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.