P218D: The throttle or fuel inhibit circuit B signal is low
The throttle or fuel inhibit circuit B signal is low. Check the component, its connector and wiring.
| Code | P218D |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P218D 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 P218D 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
- P2188 Mixture too rich at idle (bank 1)
- P2189 Mixture too lean at idle (bank 2)
- P218A The throttle actuator B control system idle position needs its learning
- P218C Throttle or fuel inhibit circuit B operates out of range or performs incorrectly
- P218E The throttle or fuel inhibit circuit B signal is high
- P218F The engine warning lamp is illuminated
- P2190 The fuel and air mixture is too rich at idle on bank 2
- P2191 Mixture too lean at higher load (bank 1)
- 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 P218D mean?
The throttle or fuel inhibit circuit B signal is low. Check the component, its connector and wiring.
How do you clear P218D?
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, P218D 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.
