Turbocharger Wastegate Solenoid A Circuit High
The P0246 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the turbocharger wastegate solenoid A circuit. This solenoid controls boost pressure by regulating the wastegate actuator. A high voltage condition typically points to a short to power, open circuit, or faulty solenoid. This can cause overboost or underboost conditions, potentially leading to engine damage if not addressed.
01. Most Common Causes
- Faulty turbocharger wastegate solenoid A
- Short to power in the solenoid circuit
- Open or damaged wiring/connector
- Corroded electrical connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Overboost or underboost condition
- Excessive exhaust smoke
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the wastegate solenoid and wiring for damage or corrosion.
Step 3: Test solenoid resistance with a multimeter (specs vary, typically 15-30 ohms).
Step 4: Check for voltage at solenoid connector with key on (should be battery voltage on one pin).
Step 5: If wiring and solenoid are good, test ECM output or replace solenoid.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with P0246 can cause erratic boost pressure, leading to potential engine damage or catalytic converter failure. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the vehicle and whether the solenoid or wiring needs replacement.