P201CIntake Manifold Runner Control Actuator Supply Voltage Low (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P201C reports that the electric flap actuator of bank 2 is not getting enough supply voltage. It only makes sense on V engines that give each bank its own powered actuator. No manufacturer documents P201C publicly. The bank 1 counterpart P201B is described by GM for its DC-motor swirl drive: the driver supply below 6 V while the relay feed is above 11 V, in 240 of 300 samples, Type B. That logic separates a weak battery, which would also pull the relay feed down, from a loss on the branch to the actuator. CARB treats such actuators as comprehensive output components and requires circuit faults to be found continuously. In practice the search starts at the fuse and supply pin of the bank 2 actuator. If both banks report a supply fault at once, look for a shared fuse or relay first.
- What you may notice
- Malfunction indicator lamp on
- Bank 2 flaps stop working
- Likely causes
- LikelyFuse or relay feeding the bank 2 actuator failed
- PossibleDamaged supply wire or connector at the bank 2 actuator
- RareActuator electronics loading the supply down
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.