Turbocharger Wastegate Solenoid A High
The turbocharger's wastegate solenoid is stuck in the open position or has an electrical short, preventing proper boost pressure control. Think of it like a relief valve that's jammed open—exhaust gases bypass the turbine instead of spinning it up.
The ECM monitors the solenoid control circuit voltage when commanding the wastegate open/closed. A 'High' code means the voltage is above the expected threshold, indicating an open circuit, broken solenoid coil, or wiring short to power.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Control Voltage | 0.5–4.5V (varies by command) | >5V or no voltage response |
| Solenoid Coil Resistance | 5–15 ohms (typical) | Open circuit or >20 ohms |
Code P0247 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0247 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.