OBD-II code · Powertrain (generic, extended)
P217B Fuel Injector Group G Supply Voltage Circuit Low
The supply voltage feeding injector group G has dropped below the lower limit. The injectors in this group lose drive voltage and may stop firing, so the cylinders they serve run lean or cut out. Causes: a blown fuse, a failed injector supply relay, a voltage drop in the supply harness, or a poor ground or connector on the group-G supply.
Is it safe to drive with P217B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyFuse, relay, or wiring fault on supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Injector Group G
Related codes
- P2147Fuel Injector Group A Supply Voltage Circuit Low
- P2150Fuel Injector Group B Supply Voltage Circuit Low
- P2153Fuel Injector Group C Supply Voltage Circuit Low
- P2156Fuel Injector Group D Supply Voltage Circuit Low
- P216BFuel Injector Group E Supply Voltage Circuit Low
- P216EFuel Injector Group F Supply Voltage Circuit Low
- P217EFuel Injector Group H Supply Voltage Circuit Low
- P2178System Too Rich Off Idle Bank 1
- P2179System Too Lean Off Idle Bank 2
- P217AFuel Injector Group G Supply Voltage Circuit/Open
- P217CFuel Injector Group G Supply Voltage Circuit High
- P217DFuel Injector Group H Supply Voltage Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.