Code Definition

P0028 — Intake Valve Control Solenoid Circuit Range/Performance (Bank 2)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0028

P0028 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0028 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0028 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC P0028 is a range or performance fault in the bank 2 intake valve control solenoid, the oil control valve (OCV) that meters engine oil to the intake camshaft phaser in the variable valve timing system. The Engine Control Module commands this solenoid and watches how the intake cam responds; P0028 sets when the solenoid is electrically intact but its hydraulic performance is out of range, so the cam does not reach or hold the commanded position within the expected time. This differs from a plain circuit code because the wiring can test good while oil flow through the solenoid is restricted o...

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