P0243
Turbocharger/Supercharger Wastegate Actuator A
Generic fault on wastegate actuator A. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
What we see in the workshop
ON FORD ECOBOOST
Wastegate solenoid faults are a common EcoBoost boost-control complaint and present very similarly to a mechanical wastegate problem.
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Common causes
Ordered by how often each turns out to be the cause.
- Actuator failedCommon
Parts involved
- Wastegate Actuator A
- Actuator Wiring
P0243 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.