P2372 code meaning
Fuel Volume Regulator B Control Circuit Low
Powertrain system Generic code P23xx codes Check engine light
What P2372 means
P2372 says the line driving fuel volume regulator B is pulled too low, as a rule by contact with ground. No manufacturer documents this B code publicly; it mirrors P0003 on regulator A. Ford's 2023 diesel detects that condition with the valve switched off: the voltage reported by the driver chip then falls below 2.8 V, where about 5 V would be normal. Deutz's EMR controller files a ground short on the feeding (high-side) wire of its volume control valve under P0003-00. Which side the short touches matters: on the feed side the valve loses its current, on the switched ground side it can be energised all the time, so delivery of pump B no longer follows the command. Chafed harness sections near hot engine parts are the classic finding.
P2372 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2372
- Check engine light on
- Rail pressure too high or too low depending on the affected side
- Limp-home with reduced power
Common causes of P2372
- Most likelyControl wire chafed through to ground
- PossibleMoisture in the regulator connector
- Less likelyInternal short in the regulator coil
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel volume regulator bHigh pressure fuel pumpFuel volume regulator wiring
What each part of P2372 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 3 | Area: ignition system or misfire. |
| 72 | The exact fault in that area. |
What to do next
- Note P2372 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2372
What does P2372 mean?
P2372 means "Fuel Volume Regulator B Control Circuit Low". P2372 says the line driving fuel volume regulator B is pulled too low, as a rule by contact with ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2372?
Drive gently and only to a workshop. With P2372 the car can go into limp mode (reduced power) to protect itself.
Will P2372 fail an emissions test?
Yes, it can. P2372 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2372 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2372 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.