Code Definition

P1103 — Turbocharger Wastegate Actuator

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Mitsubishi

About P1103

P1103 is a manufacturer-specific powertrain diagnostic trouble code recorded for Mitsubishi vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1103 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

For Mitsubishi vehicles, the P1103 fault code relates to a malfunction in the turbocharger wastegate actuator circuit or its mechanical operation. This code is set when the Engine Control Module (ECM) detects that the wastegate actuator is not regulating boost as commanded, so actual boost pressure does not match the target value. The wastegate actuator controls the flow of exhaust gas around the turbine, and through the boost control solenoid it regulates the turbocharger boost pressure that is essential for engine performance. When this code is set the driver may notice reduced power, hesita...

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