Turbocharger Boost Control Supply Voltage Circuit High
The P006F code indicates that the Engine Control Module (ECM) has detected a voltage higher than expected in the boost control solenoid supply circuit. This circuit provides power to the solenoid that regulates boost pressure from the turbocharger or supercharger. A high voltage condition can be caused by a short to battery voltage, a faulty boost control solenoid, or a damaged wiring harness. This can lead to improper boost control, potentially causing overboost or underboost conditions.
1. Most Common Causes
- Short to battery voltage in the boost control solenoid circuit
- Faulty boost control solenoid
- Damaged wiring or connectors in the boost control circuit
- ECM internal fault (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Overboost or underboost condition
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all stored codes and freeze frame data.
Step 2: Visually inspect the boost control solenoid and its wiring for damage, corrosion, or loose connections.
Step 3: Test the boost control solenoid supply voltage with a multimeter; it should be battery voltage (12V) with key on.
Step 4: Check for shorts to voltage by disconnecting the solenoid and measuring voltage at the harness connector.
Step 5: If voltage is normal, test the solenoid resistance and compare to manufacturer specs.
Step 6: If all checks pass, consider an ECM fault and perform a relearn or reprogramming if applicable.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced engine power, poor fuel economy, and potential damage to the turbocharger or engine due to overboost.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the cause. A boost control solenoid replacement is usually around $50-$100, plus diagnostic time.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.