P0250: Turbocharger Wastegate Solenoid B Circuit High
The P0250 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the turbocharger wastegate solenoid B circuit. This solenoid controls the wastegate actuator, which regulates boost pressure. A high voltage condition typically points to a short to power, open circuit, or faulty solenoid. This can lead to overboost or underboost conditions, potentially causing engine damage or reduced performance.
01. Most Common Causes
- Faulty turbocharger wastegate solenoid B
- Short to power in the solenoid circuit
- Open or shorted wiring/connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine power or limp mode
- Poor acceleration or hesitation
- Overboost or underboost condition
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0250 and check for other codes.
Step 2: Visually inspect the wastegate solenoid B connector and wiring for damage or corrosion.
Step 3: Test the solenoid resistance with a multimeter (typically 15-30 ohms).
Step 4: Check for voltage at the 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 to drive long distances as it can cause overboost or underboost, potentially damaging the turbo or engine. Limp mode may limit speed.
How much does it cost to fix?▼
Typically $50-$150 for a new solenoid and labor, but diagnostic fees may add $50-$100.