Powertrain
generic / SAE
P027B
Fuel Pump Module B Control Circuit Range/Performance
Fuel pump module B does not respond as expected. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 7B
Possible causes
- Module B internal fault high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
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: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–5 h
- Component: fuel pump module b
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012