Powertrain
generic / SAE
P0033
Turbocharger Bypass Valve Control Circuit
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.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number– / 33
Possible causes
- Bypass solenoid failed high
- Open or shorted wiring to solenoid medium
- Connector corrosion or poor contact low
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 100–500 €
- Estimated time: 0.5–3 h
- Component: turbocharger bypass valve
- Component: wastegate solenoid
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012