Code result
P0033
Turbocharger Bypass Valve Control Circuit
Moderate severity
What it means
The ECU detects an electrical fault in the turbocharger bypass (wastegate) valve control circuit. Voltage or current measured on the solenoid output deviates from expected values during commanded actuation.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Bypass solenoid failed
highOne of the most commonly reported causes for this code — check this first.
Open or shorted wiring to solenoid
mediumA plausible cause — test and verify before replacing parts.
Connector corrosion or poor contact
lowLess common, but worth ruling out after the more likely causes.
Related help
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