OBD-II code · Powertrain (generic)
P00C5 Turbocharger/Supercharger B Turbine Overspeed
Turbocharger B turbine speed exceeded its safe limit. Same as P0049 on turbo B. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P00C5?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyWastegate B stuck closed
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–10 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Turbocharger B, Wastegate B
Related codes
- P0049Turbocharger/Supercharger A Turbine Overspeed
- P00C2Turbocharger/Supercharger Bypass Valve B Control Circuit High
- P00C3Turbocharger/Supercharger Bypass Valve B Control Circuit Range/Performance
- P00C4Turbocharger/Supercharger Bypass Valve B - Mechanical
- P00C6Fuel Rail Pressure Too Low - Engine Cranking Bank 1
- P00C7Intake Air Pressure Measurement System - Multiple Sensor Correlation Bank 1
- P00C8Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.