OBD-II code · Powertrain (generic, extended)
P201B Intake Manifold Runner Control Actuator Supply Voltage Low (Bank 1)
The supply voltage feeding the IMRC actuator on bank 1 is below the lower limit — typically a fuse, relay, or harness fault on the supply rail.
Is it safe to drive with P201B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySupply fuse blown
- PossibleOpen supply wire
- PossibleSupply relay contacts pitted
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Imrc Actuator, Imrc Supply Relay, Imrc Supply Fuse
Related codes
- P201CIntake Manifold Runner Control Actuator Supply Voltage Low (Bank 2)
- P2018Intake Manifold Runner Position Sensor/Switch Circuit Open (Bank 2)
- P2019Intake Manifold Runner Position Sensor/Switch Range/Performance (Bank 2)
- P201AReductant Injection Valve Circuit Range/Performance (Bank 2 Unit 1)
- P201DIntake Manifold Runner Control Actuator Internal Performance (Bank 1)
- P201EIntake Manifold Runner Control Actuator Internal Performance (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.