Powertrain
generic / SAE
P2632
Fuel Pump B Control Circuit / Open
The controller cannot drive the secondary fuel pump (B). Common on dual-tank trucks, GDI lift-pump systems, or alt-fuel installations — fault stops fuel delivery from this stage.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number6 / 32
Possible causes
- Open pump motor winding high
- Failed pump relay medium
Symptoms
- Check engine light on
- Hard start, no start, or stalling under load
- Power loss especially at high load or rpm
- Possible long cranking time
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–1200 €
- Estimated time: 1–4 h
- Component: fuel pump b
- Component: fuel pump relay b
- Component: wiring harness
- MIL / check engine light
Sources
References
sae:J2012