P0028 — Intake valve timing control issue on bank 2

The engine's intake valve timing on bank 2 is not adjusting properly due to a problem in the solenoid circuit. This can cause rough running, reduced fuel efficiency, or increased emissions.

Common causes

The cause is almost always one of a few things. Here they are — P0028 rarely comes from anything outside this list:

• Faulty intake valve control solenoid
• Wiring issues or poor electrical connections
• Dirty or clogged solenoid valve
• Low or dirty engine oil affecting solenoid operation
• Faulty camshaft position sensor

Where to start

In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:

1. Check and clean electrical connectors and wiring
2. Inspect and clean or replace the intake valve control solenoid
3. Change engine oil and filter if dirty or overdue
4. Test camshaft position sensor and replace if faulty
5. Replace solenoid or related timing components if needed

That is what holds for P0028 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.