P201C
Intake Manifold Runner Control Actuator Supply Voltage Low (Bank 2)
The supply voltage feeding the IMRC actuator on bank 2 is below the lower limit — typically a fuse, relay, or harness fault on the supply rail.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Supply fuse blownCommon
Parts involved
- IMRC Actuator
- IMRC Supply Relay
P201C is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.