OBD-II code · Powertrain (generic, extended)
P2021 Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 2)
The IMRC position sensor on bank 2 reports a voltage above the upper threshold — usually a short to positive or an open ground.
Is it safe to drive with P2021?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal shorted to positive
- PossibleSensor ground open
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Imrc Position Sensor B2, Imrc Wiring
Related codes
- P2017Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 1)
- P2018Intake Manifold Runner Position Sensor/Switch Circuit Open (Bank 2)
- P2020Intake Manifold Runner Position Sensor/Switch Circuit Low (Bank 2)
- P2022Intake Manifold Runner Position Sensor/Switch Circuit High (Bank 2)
- P201EIntake Manifold Runner Control Actuator Internal Performance (Bank 2)
- P201FReductant Pump A Stuck On
- P2023Intake Manifold Runner Position Sensor/Switch Circuit Intermittent (Bank 2)
- P2024EVAP Fuel Vapor Temperature Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.