244C00
Moderate244C00 — Boost Control Actuator: Open Circuit
Description
What the Code Means
244C00 is set by the DME when the boost pressure actuator circuit is open: the control unit stops receiving feedback from the actuator that controls the turbocharger geometry. Causes include a connector that isn't fully seated, damaged wiring, or a failed actuator. In practice, this code often shows up after work around the turbo and EGR cooler: the actuator connector may not have been clicked fully home during reassembly.
Symptoms
Symptoms
- Power loss, no response to the accelerator pedal.
- Drivetrain error message on the instrument cluster.
- Engine drops into limp mode with boost limited.
Causes and fixes
Diagnosis and Repair
- Check that the actuator connector is securely latched — after recent work (for example, an EGR cooler replacement) this is the most likely cause: the connector may not have been plugged in all the way.
- Check the wiring from the DME to the actuator for opens and damaged insulation.
- If the connector and wiring are good, replace the actuator (OEM
11657800621). - After fixing the cause, reset the DME adaptations so the module relearns boost control.
Possible secondary damage
Secondary Damage
Ignoring a failed actuator can lead to uncontrolled boost, damage to the turbo or intercooler, and engine overheating.