Powertrain
generic / SAE
P2370
Fuel Volume Regulator B Control Circuit Open
An open circuit is detected on the control line for the second fuel volume regulator (B) used on twin high-pressure-pump diesel systems. Without this regulator the high-pressure pump cannot meter fuel for its assigned cylinder bank, leading to rail-pressure faults and limp-home behaviour.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 70
Possible causes
- Open in harness or connector to regulator B high
- Regulator solenoid winding open medium
- Pin pushed back out of connector body low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–800 €
- Estimated time: 1–3 h
- Component: fuel volume regulator b
- Component: high pressure pump b
- Component: fuel rail
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012