OBD-II code · Powertrain (generic)
P027A Fuel Pump Module B Control Circuit/Open
Open circuit at fuel pump module B (second pump module on dual-tank or high-output fuel systems).
Is it safe to drive with P027A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring break
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Pump Module B, Module Wiring
Related codes
- P025AFuel Pump Module A Control Circuit/Open
- P0277Cylinder 6 Injector A Circuit High
- P0278Cylinder 6 Contribution/Balance
- P0279Cylinder 7 Injector A Circuit Low
- P027BFuel Pump Module B Control Circuit Range/Performance
- P027CFuel Pump Module B Control Circuit Low
- P027DFuel Pump Module B Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.