Intake valve Control Solenoid Circuit Range/Performance Bank 2
Code P0028 means the Bank 2 intake valve control solenoid is not performing within expected range. This is the Bank 2 counterpart to P0026. The solenoid is receiving correct commands but the Bank 2 intake cam timing response is outside the acceptable performance window. All diagnosis and repair focuses on the Bank 2 intake cam solenoid, its oil screen, and the Bank 2 intake cam phaser.
What You Might Notice
- Check engine light on
- Rough idle
- Reduced power
- Poor fuel economy
Most Common Causes
- 1
Low or dirty engine oil
Sludge or low oil level prevents the Bank 2 intake VVT system from operating within performance limits.
- 2
Stuck or sluggish Bank 2 intake VVT solenoid
Sludge causes slow solenoid response, taking the Bank 2 intake cam outside its performance window.
- 3
Clogged Bank 2 intake solenoid screen
A partially blocked screen reduces oil flow to the phaser, causing slow cam response.
- 4
Worn Bank 2 intake cam phaser
A worn phaser cannot maintain commanded timing, triggering performance faults.
How to Diagnose It
- 1
Check Low or dirty engine oil — Sludge or low oil level prevents the Bank 2 intake VVT system from operating within performance limits.
- 2
Check Stuck or sluggish Bank 2 intake VVT solenoid — Sludge causes slow solenoid response, taking the Bank 2 intake cam outside its performance window.
- 3
Check Clogged Bank 2 intake solenoid screen — A partially blocked screen reduces oil flow to the phaser, causing slow cam response.
- 4
Check Worn Bank 2 intake cam phaser — A worn phaser cannot maintain commanded timing, triggering performance faults.
How to Fix It
- 1
Change engine oil and filter
Fresh oil is always the first step for VVT performance codes.
- 2
Clean Bank 2 intake VVT solenoid screen
Remove solenoid, clean screen, reinstall, and recheck.
- 3
Test solenoid operation
Verify plunger moves freely. Replace if sluggish.
- 4
Inspect Bank 2 intake cam phaser
Replace if phaser cannot maintain commanded timing positions.
- 5
Clear and verify
Confirm resolution after a drive cycle.
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