P0243

Code

Generic P — Powertrain

Turbocharger/Supercharger Wastegate Actuator A

Brand: Generic

Type: P — Powertrain

Views: UK: 40 EN: 156 RU: 50

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Read and record freeze frame and live data with a scan tool (boost, commanded duty, actual position if available)
Visual inspection of actuator, connector, wiring harness, and vacuum/boost lines
Backprobe connector to check reference voltage, signal voltage, and ground with key ON and while commanding actuator
Measure coil or solenoid resistance and compare to service data (or typical expected range)
Wiggle test wiring while observing live data for intermittent changes
Command actuator or control solenoid with a scan tool and observe movement or change in boost

Reference supply: typically 5V or battery voltage depending on actuator type — consult service data
Control: PCM may use PWM (duty cycle 0–100%) to control solenoid/actuator
Typical solenoid coil resistance (vehicle-dependent): approximately 10–50 ohms (consult service manual)
Position sensor output (if fitted): about 0.5–4.5 V across travel — verify with manufacturer specs
When commanded ON, expect a measurable change in duty cycle/voltage and corresponding actuator movement

Retrieve all stored codes and freeze frame data. Note related turbo, MAP, or boost sensor codes.
Visually inspect actuator, connector, wiring, and any vacuum/boost hoses for damage or disconnection.
With ignition ON (engine off), backprobe the actuator connector and verify reference voltage, ground, and signal. Compare to expected values in service information.
Measure resistance of the actuator/solenoid coil. If open or significantly out of range, replace actuator/solenoid.
Use a scan tool to command the actuator or boost control solenoid while observing live boost and signal/duty values. Confirm actuator moves or solenoid responds.
Perform continuity checks from actuator connector to PCM pins; check for shorts to battery and ground.
If actuator is vacuum-operated, check vacuum supply and operation of any control valves; verify the wastegate linkage moves freely and is not seized or obstructed.
Repair any wiring/connectors or replace faulty actuator/solenoid. Clear codes and road-test to confirm proper boost control and no return of the code.
If wiring and actuator test good but code persists, consider PCM diagnostics or replacement only after confirming inputs/outputs at the PCM.