OBD-II code · Powertrain (generic)
P027C Fuel Pump Module B Control Circuit Low
Fuel pump module B control voltage below expected range. 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.
Is it safe to drive with P027C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWiring shorted to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- P025CFuel Pump Module A Control Circuit Low
- P0279Cylinder 7 Injector A Circuit Low
- P027AFuel Pump Module B Control Circuit/Open
- P027BFuel Pump Module B Control Circuit Range/Performance
- P027DFuel Pump Module B Control Circuit High
- P027ECold Start Fuel Injection Quantity A Lower Than Expected
- P027FCold Start Fuel Injection Quantity A Higher Than Expected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.