P201B: The supply voltage for the intake manifold air control actuator on bank 1 is
The supply voltage for the intake manifold air control actuator on bank 1 is too low. Check the battery, alternator and earth connections.
| Code | P201B |
|---|---|
| System | Engine and transmission |
| Group | P20xx, Emissions: catalysts and AdBlue |
| Type | Generic: it means the same on every make |
How to read and clear P201B 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 P201B 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
- P2017 Intake manifold runner position sensor circuit high (bank 1)
- P2018 The position sensor or switch circuit for the intake air actuator on bank 1 has
- P2019 There is a fault in the position sensor or switch circuit for the intake
- P201A The AdBlue injector circuit for unit 1 on bank 2 operates outside its range
- P201C The supply voltage for the intake manifold air control actuator on bank 2 is
- P2020 The position sensor or switch signal for the intake air actuator on bank 2 is
- P2021 The position sensor or switch circuit for the intake manifold air actuator on
- P2022 The position sensor or switch circuit for the intake manifold air actuator on
- P2002 Diesel particulate filter efficiency below threshold (bank 1)
- P2003 Diesel particulate filter efficiency below threshold (bank 2)
- P2004 Intake manifold runner control stuck open (bank 1)
- P2005 Intake manifold runner control stuck open (bank 2)
What does code P201B mean?
The supply voltage for the intake manifold air control actuator on bank 1 is too low. Check the battery, alternator and earth connections.
How do you clear P201B?
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, P201B 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.
