P0246
UniversalTurbocharger Wastegate Solenoid A High
The engine computer has detected a high electrical condition in the circuit for wastegate solenoid A. This solenoid helps control the turbocharger wastegate, which regulates boost pressure. The code identifies a detected circuit condition; it does not by itself prove the solenoid needs replacement. Depending on the vehicle and fault, boost control may be affected, potentially causing reduced performance or other drivability changes.
⚠️ Before You Begin (Safety First)
Avoid hard acceleration or heavy loads until the fault is diagnosed. If the engine loses power severely, behaves unusually, produces smoke or abnormal noises, or shows signs of overheating, stop driving when safe and arrange qualified assistance.
Common Symptoms
- The check-engine light may be on, with no noticeable change in how the vehicle drives.
- Reduced power or sluggish acceleration may occur if wastegate control affects boost delivery.
- Boost-related performance may be inconsistent if the circuit fault prevents reliable solenoid operation.
- Other drivability changes may occur depending on how the vehicle manages boost when it detects the fault.
Common Causes
- A damaged, loose, corroded, or contaminated connector or wiring may disrupt the solenoid circuit.
- A wiring fault, including a short to a voltage source or an open circuit that affects the monitored signal, may produce a high-circuit reading.
- The wastegate solenoid may have an internal electrical fault.
- A fault in the engine computer's solenoid control circuit may be responsible.
- A related boost-control or wiring problem may need investigation before the solenoid is judged faulty.
Diagnostic Steps
- Check for additional diagnostic codes and save available freeze-frame information; related codes or operating conditions can help guide diagnosis.
- With the engine off and cool, visually inspect accessible wiring and the solenoid connector for damage, looseness, corrosion, or contamination.
- Check the vehicle's owner information for any relevant warnings and note changes in power or engine behavior.
- Do not adjust the wastegate or replace the solenoid based only on this code; have circuit testing and component checks performed using service information for the exact vehicle.
When to Call a Professional
Confirm the code and review available freeze-frame and scan data. Inspect the solenoid connector and harness, then test the circuit and solenoid using the vehicle-specific service information. Where supported, compare commanded solenoid operation with scan data and verify the control circuit and engine-computer driver before replacing parts.
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Commonly Asked Questions
Does P0246 prove that the wastegate solenoid has failed?
No. It reports a high electrical condition in the solenoid A circuit. Wiring, connectors, the solenoid, or the engine computer's control circuit may need testing.
What does the wastegate solenoid do?
It helps control the turbocharger wastegate, which regulates boost pressure. The exact control strategy depends on the vehicle.
Can I keep driving with P0246?
The effect can vary. Avoid heavy loads and hard acceleration, and arrange diagnosis. Stop when safe if there is severe power loss, smoke, abnormal noise, or overheating.
Should I replace the solenoid first?
Not without testing. Inspect the connector and wiring and check the circuit and solenoid according to the vehicle-specific service information.
Related Diagnostic Video
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