Turbo/Supercharger Wastegate Solenoid C Circuit High
The P0252 code means the vehicle's onboard diagnostic system has detected: Turbo/Supercharger Wastegate Solenoid C Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $100 - $500 (parts and labor)
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Common Symptoms
- Check Engine Light on
- Reduced boost from affected turbo
- Significant power loss
- Engine in reduced power mode
Probable Causes (Ranked by Likelihood)
- Open circuit in solenoid C wiring Very High
- Burned-out solenoid C coil High
- Disconnected connector Moderate
- PCM driver open circuit Low
Step-by-Step Diagnostic Procedure
-
Measure solenoid C resistance. Infinite ohms confirms open coil.
-
Check connector is fully seated.
-
Test wiring continuity from PCM to solenoid.
-
Replace solenoid if wiring is intact.
Frequently Asked Questions
Why is the solenoid C circuit open?
The solenoid coil may have burned out from heat or age, or a wire may be broken in the harness.
Will the turbo work without solenoid C?
The turbo will still spin, but boost pressure will not be properly controlled by the wastegate, resulting in reduced power as the PCM enters a safe mode.
How do I access wastegate solenoid C?
Location varies by vehicle. On most twin-turbo engines, it is mounted near the turbocharger on the engine block or on a bracket in the engine bay.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0252 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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