OBD-II code · Powertrain (generic, extended)
P2146 Fuel Injector Group A Supply Voltage Circuit/Open
The ECU detects an open or missing supply voltage on injector group A. The injectors of this bank cannot be energized; the affected cylinders may not fire and the engine runs rough or stalls.
Is it safe to drive with P2146?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyBlown injector fuse
- PossibleFaulty injector supply relay
- PossibleOpen in supply wiring
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
- P2149Fuel Injector Group B 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
- P2143EGR Vent Control Circuit/Open
- P2144EGR Vent Control Circuit Low
- P2145EGR Vent Control Circuit High
- P2147Fuel Injector Group A Supply Voltage Circuit Low
- P2148Fuel Injector Group A Supply Voltage Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.