Intake Manifold Runner Position Sensor/Switch Range/Performance (Bank 1)
The IMRC position sensor on bank 1 reports a value, but it does not match the commanded flap state — for example, the flap is commanded closed yet the sensor still reads open. Common on engines where the connector pin clip wears out and the sensor reads erratic positions.
Affected components
- Imrc position sensor
- Imrc actuator
Common causes
- High likelihood: Connector clip worn — intermittent contact
- Medium likelihood: Flap sticking due to carbon
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.