Is It Safe to Drive With a P0243 Code?
Common Symptoms of a P0243 Fault
EML on
Possible loss of power
Possible overboost or underboost symptoms
Limp mode on some vehicles
Possible Causes of P0243
A P0243 code can be triggered by faults across several systems. Identifying the exact root cause requires proper diagnostic equipment and live data — not just reading the code.
Wastegate Solenoid Wiring Fault
Wiring or connector to the wastegate solenoid is damaged.
Wastegate Solenoid Failure
The solenoid itself has failed electrically.
Fuse Failure
Fuse protecting the boost control circuit has blown.
ECU Output Fault
The ECU output driving the wastegate solenoid has failed.
Why we don't list the exact part: A P0243 code tells you what's happening but not why. Replacing parts based on the code alone is the most common way drivers waste money. A proper diagnosis identifies the specific cause first.
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P0243 and Your MOT
A stored P0243 fault code will cause your car to fail its MOT. The engine management light will be illuminated during the test — an automatic failure under current MOT standards. Even if the light temporarily clears, the code remains in ECU memory and can be read by testers.
Get the fault diagnosed and repaired first, then have the code cleared and confirm the light stays off before booking your MOT.