Turbo Wastegate Solenoid B Range/Performance
The P0248 code indicates that the Engine Control Module (ECM) has detected a malfunction in the turbocharger wastegate solenoid B circuit. This solenoid controls the boost pressure by regulating the wastegate actuator. The code is triggered when the actual boost pressure does not match the desired pressure within a specified range, often due to mechanical or electrical issues in the solenoid or its circuit.
01. Most Common Causes
- Faulty turbocharger wastegate solenoid B
- Wiring or connector issues in the solenoid circuit
- Vacuum leaks or blocked hoses to the wastegate actuator
- Stuck or malfunctioning wastegate actuator
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power and acceleration
- Turbocharger overboost or underboost
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the wastegate solenoid B, wiring, and vacuum hoses for damage or disconnection.
Step 3: Test the solenoid resistance with a multimeter (specs vary by vehicle, typically 15-30 ohms).
Step 4: Check for proper voltage and ground at the solenoid connector with the engine running.
Step 5: Perform a boost pressure test to verify wastegate actuator operation.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as reduced engine power and potential boost issues can lead to further damage or unsafe driving conditions.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, including parts (solenoid $50-$150) and labor ($100-$250).