Turbocharger/Supercharger Wastegate Solenoid A High
What does P0246 mean?
The P0246 code means the vehicle's onboard diagnostic system has detected: Turbocharger/Supercharger Wastegate Solenoid A High. This is a moderate severity code.
Common Symptoms
- Check Engine Light illuminated
- Underboost condition -- turbo feels weak
- Engine in limp mode
- Sluggish acceleration
- Poor fuel economy at higher RPMs
Probable Causes (Ranked by Likelihood)
- Open circuit in wastegate solenoid wiring Very High
- Faulty wastegate solenoid coil (open internally) High
- Disconnected or corroded solenoid connector High
- Broken ground wire to wastegate solenoid Moderate
- PCM driver circuit failure Low
Step-by-Step Diagnostic Procedure
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Measure wastegate solenoid resistance -- an open reading (OL/infinite) indicates a burnt-out coil
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Check for battery voltage at the solenoid power wire with key on -- if missing, trace the power supply circuit
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Verify the PCM ground wire for the solenoid has continuity and less than 1 ohm resistance
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Inspect the solenoid connector for pushed-out pins, corrosion, or heat damage
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Replace the solenoid if coil is open; repair wiring if power or ground circuit is broken
Frequently Asked Questions
Can I drive with code P0246?
You can drive short distances. A high circuit typically causes the wastegate to stay open, resulting in underboost rather than overboost. The engine will lack power but is at lower risk of damage.
What is the difference between P0245 and P0246?
P0245 indicates a low (short to ground) circuit, which can cause overboost. P0246 indicates a high (open circuit) condition, which typically causes underboost since the solenoid cannot close the wastegate.
How long does a wastegate solenoid last?
Wastegate solenoids typically last 80,000-150,000 miles. Heat exposure from the turbocharger accelerates wear, and the electromagnetic coil inside can burn out over time.