Turbo/Supercharger Boost Control Supply Voltage Low
The P006E code indicates that the powertrain control module (PCM) has detected a low voltage condition in the boost control solenoid supply circuit. This solenoid regulates boost pressure by controlling the vacuum or electronic actuator on the turbocharger or supercharger. Low voltage can prevent proper solenoid operation, leading to reduced boost, limp mode, or drivability issues.
1. Most Common Causes
- Faulty boost control solenoid with abnormal internal resistance
- Supply circuit wiring shorted to ground
- Corroded, oxidized, or damaged pins on the solenoid connector
- Blown or high-resistance fuse in the supply circuit
- Defective boost system power relay
- Internal ECM/PCM failure in the supply circuit driver
- Excessive resistance in circuit connections or grounds
2. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine power or limp mode
- Poor acceleration or turbo lag
- Overboost or underboost condition
- Possible abnormal turbo noise
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the boost control solenoid connector and wiring for damage or corrosion.
Step 3: Test the solenoid supply voltage at the connector with a multimeter (should be battery voltage with key on).
Step 4: Check the fuse and relay for the boost control system.
Step 5: If voltage is present, test solenoid resistance and actuation with a scan tool or manually.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as low boost can cause poor performance and potential engine damage. Limp mode may limit speed to prevent damage.
How much does it cost to fix?▼
Typical repair costs range from $50 to $150 for parts like a solenoid or fuse, plus diagnostic time. Labor can add $100-$200 if wiring repair is needed.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.