Intake Valve Control Solenoid Circuit Range/Performance Bank 2
The P0028 code indicates that the Engine Control Module (ECM) has detected a malfunction in the intake valve control solenoid circuit for Bank 2. This solenoid is part of the Variable Valve Timing (VVT) system, which adjusts the timing of the intake valves to optimize engine performance and fuel efficiency. The code is set when the ECM detects that the solenoid's electrical circuit is out of the expected range or the solenoid is not performing as commanded. This can lead to poor engine performance, reduced fuel economy, and increased emissions.
1. Most Common Causes
- Faulty intake valve control solenoid on Bank 2
- Wiring or connector issues in the solenoid circuit
- Low engine oil level or dirty oil affecting solenoid operation
- ECM software or hardware malfunction
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Reduced engine power and acceleration
- Poor fuel economy
3. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0028 is present. Check for additional codes.
Step 2: Inspect engine oil level and condition; top off or change if necessary.
Step 3: Visually inspect the wiring and connector for the Bank 2 intake valve control solenoid for damage, corrosion, or loose connections.
Step 4: Test the solenoid resistance with a multimeter and compare to manufacturer specifications.
Step 5: If wiring and solenoid are okay, check the ECM for proper output signals to the solenoid.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code as it can cause poor engine performance and potential damage to the VVT system. You may experience reduced power and fuel economy.
How much does it cost to fix?▼
The cost to fix P0028 typically ranges from $150 to $400, including parts and labor. The solenoid itself costs $50-$150, and labor is about $100-$250 depending on the vehicle.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.