P217B: The fuel injector unit G power supply voltage is below normal
The fuel injector unit G power supply voltage is below normal. It usually comes from the battery, the alternator or a poor connection.
| Code | P217B |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P217B with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P217B with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2177 System too lean off idle (bank 1)
- P2178 Mixture too rich away from idle (bank 1)
- P2179 Mixture too lean away from idle (bank 2)
- P217A The fuel injector unit G power supply voltage has a broken or disconnected wire
- P217C The fuel injector unit G power supply voltage is above normal
- P217D The fuel injector unit H power supply voltage has a broken or disconnected wire
- P217E The fuel injector unit H power supply voltage is below normal
- P217F The fuel injector unit H power supply voltage is above normal
- P2100 Throttle actuator A control motor circuit open
- P2101 Throttle actuator A control motor circuit range or performance
- P2102 Throttle actuator A control motor circuit low
- P2104 Throttle control system: forced idle
What does code P217B mean?
The fuel injector unit G power supply voltage is below normal. It usually comes from the battery, the alternator or a poor connection.
How do you clear P217B?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P217B comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
