P2174: The throttle suddenly lets through less air than expected
The throttle suddenly lets through less air than expected. The throttle, its connector and its wiring should be checked.
| Code | P2174 |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2174 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 P2174 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
- P2170 The exhaust pressure regulator vent solenoid control gives a lower signal than
- P2171 The exhaust pressure regulator vent solenoid control gives a higher signal than
- P2172 The throttle control system detects a sudden excessive rise in airflow
- P2173 The throttle control system detects airflow that is too high
- P2175 The throttle control system detects airflow that is too low
- P2176 The throttle actuator control system idle position needs its learning procedure
- P2177 System too lean off idle (bank 1)
- P2178 Mixture too rich away from idle (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 P2174 mean?
The throttle suddenly lets through less air than expected. The throttle, its connector and its wiring should be checked.
How do you clear P2174?
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, P2174 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.
