Intake Manifold Runner Control Circuit Performance (Bank 1)
The IMRC actuator drive circuit on bank 1 is electrically OK but its current draw or duty-cycle response is outside the calibrated profile — typically a high-resistance solenoid winding or a partially shorted driver.
Affected components
- Imrc actuator
- Imrc harness
Common causes
- High likelihood: Solenoid winding ageing — resistance climbing
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.