Powertrain
generic / SAE
P2371
Fuel Volume Regulator B Control Circuit Performance
The ECU sees implausible feedback on the control loop for fuel volume regulator B - duty cycle does not match measured rail pressure response. The regulator either reacts too slowly, sticks, or has shifted from its calibration.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 71
Possible causes
- Regulator stem sticking due to debris or wear high
- High-pressure pump wear changes regulator response medium
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: fuel volume regulator b
- Component: high pressure pump b
- Component: fuel rail
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012