What Does P2009 Mean?
DTC P2009 indicates the intake manifold runner control (IMRC) circuit on bank 1 is reading lower than expected voltage. The ECM monitors the control circuit to the IMRC actuator and sets this code when the signal voltage drops below the calibrated minimum threshold. This typically points to a short-to-ground condition in the circuit or an internally shorted actuator.
Common Causes
30%
Short to ground in the IMRC actuator wiring harness
30%
Internally shorted IMRC solenoid/actuator coil
20%
Water intrusion or corrosion in the IMRC connector
15%
Damaged wiring insulation contacting engine block or bracket
5%
ECM internal driver fault pulling circuit low
Diagnostic Steps
1
Review freeze frame data to identify operating conditions when the fault was set.
2
Inspect the IMRC actuator connector and harness on bank 1 for signs of moisture, corrosion, or melted insulation.
3
Disconnect the IMRC actuator and measure circuit voltage at the harness connector; it should match reference voltage with actuator disconnected.
4
With the actuator disconnected, check for short to ground on the control wire using an ohmmeter between the signal wire and chassis ground.
5
Measure IMRC solenoid resistance; a reading significantly below specification indicates an internal short.
6
If wiring checks pass but code persists with actuator disconnected, investigate ECM driver circuit.
Estimated Repair Cost
$75 - $400
Parts + labor, varies by vehicle and location
DTC P2009 indicates the intake manifold runner control (IMRC) circuit on bank 1 is reading lower than expected voltage. The ECM monitors the control circuit to the IMRC actuator and sets this code when the signal voltage drops below the calibrated minimum threshold. This typically points to a short-...
The most common cause of P2009 (Intake Manifold Runner Control Circuit Low Bank 1) is: Short to ground in the IMRC actuator wiring harness
Typical repair costs for P2009 range from $75 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Low safety risk. The IMRC may default to a fixed position, causing a noticeable loss of mid-range torque. Vehicle is safe to drive but performance is reduced.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2009 to identify the root cause.
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Quick Info
Category
Powertrain
System
Intake / Fuel Management
Difficulty
Type
Generic (SAE)
Recommended Tools
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