OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0033?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBypass solenoid failed
- PossibleOpen or shorted wiring to solenoid
- Less likelyConnector corrosion or poor contact
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–3 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbocharger Bypass Valve, Wastegate Solenoid, Wiring Harness, Ecm
Related codes
- P0030HO2S Heater Control Circuit (Bank 1 Sensor 1)
- P0031HO2S Heater Control Circuit Low (Bank 1 Sensor 1)
- P0032HO2S Heater Control Circuit High (Bank 1 Sensor 1)
- P0034Turbocharger Bypass Valve Control Circuit Low
- P0035Turbocharger Bypass Valve Control Circuit High
- P0036HO2S Heater Control Circuit (Bank 1 Sensor 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.