Turbo Boost Control Supply Voltage High
The P005F code indicates that the Engine Control Module (ECM) has detected a voltage signal from the turbocharger/supercharger boost control solenoid supply circuit that is higher than the expected range. This can be caused by a short to voltage in the wiring, a faulty boost control solenoid, or a malfunctioning ECM. The boost control solenoid regulates the amount of boost pressure by controlling the vacuum or electronic signal to the wastegate or bypass valve. A high voltage condition can lead to improper boost control, potentially causing overboost or underboost conditions.
01. Most Common Causes
- Short to voltage in the boost control solenoid circuit
- Faulty boost control solenoid
- Corroded or damaged wiring/connectors
- Malfunctioning ECM
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Excessive smoke from exhaust
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the boost control solenoid and wiring for damage or corrosion.
Step 3: Test the voltage at the solenoid connector with a multimeter (should be within manufacturer specs).
Step 4: Check for shorts to voltage by disconnecting the solenoid and testing the circuit.
Step 5: If wiring is OK, replace the boost control solenoid and clear codes.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause reduced engine power, poor performance, and potential damage to the turbocharger or engine. Limp mode may activate, limiting speed.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY replacement of the boost control solenoid. Professional diagnosis and repair may cost $100-$300 depending on labor rates and parts.