OBD-II code · Powertrain (generic, extended)
P2149 Fuel Injector Group B Supply Voltage Circuit/Open
The ECU detects an open or missing supply voltage on injector group B. The injectors on this bank cannot be energized, leading to misfire on the affected cylinders.
Is it safe to drive with P2149?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBlown injector group B fuse
- PossibleFaulty injector supply relay
- Less likelyPin pushed back out of connector body
Symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Fuel Injector, Injector Supply Relay, Injector Wiring
Related codes
- P2146Fuel Injector Group A Supply Voltage Circuit/Open
- P2152Fuel Injector Group C Supply Voltage Circuit/Open
- P2155Fuel Injector Group D Supply Voltage Circuit/Open
- P216AFuel Injector Group E Supply Voltage Circuit/Open
- P216DFuel Injector Group F Supply Voltage Circuit/Open
- P217AFuel Injector Group G Supply Voltage Circuit/Open
- P217DFuel Injector Group H Supply Voltage Circuit/Open
- P2147Fuel Injector Group A Supply Voltage Circuit Low
- P2148Fuel Injector Group A Supply Voltage Circuit High
- P214ASCR NOx Catalyst Inlet Temperature Too High
- P214BSCR NOx Catalyst Inlet Temperature Too High During Particulate Filter Regeneration
- P214CSCR NOx Catalyst Outlet Temperature Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.