P0075 Intake Valve Control Solenoid Circuit Bank 1

P0075 indicates an intake valve control solenoid circuit fault on bank 1. The VVT oil-control solenoid command path is not behaving correctly.

Code details

Generic OBD-II · P0

System: Fuel / Air
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the cam phaser until the intake solenoid circuit and oil-control path are tested.

Symptoms of P0075

Check-engine light on, sometimes with rough or uneven running.
Hesitation, surging, or a noticeable change in fuel economy.
Occasionally hard starting or a smell of unburnt fuel.

Common causes of P0075

A failing or contaminated sensor (MAF, MAP, oxygen or air-fuel sensor).
Intake or vacuum leaks, or an exhaust leak near an upstream sensor.
Wiring, connector, or fuel-delivery problems that skew the reading.

Useful checks before replacing parts

Check bank 1 intake control solenoid feed, ground or driver command, resistance, connector fit, and loaded circuit voltage.
Inspect oil condition, solenoid screen contamination, wiring near the cylinder head, connector oil intrusion, and related VVT codes.
Compare commanded intake cam timing with actual cam angle, oil temperature, RPM, and load during the fault.

Related OBD-II codes

These nearby fuel / air entries can help compare wording and pin down the fault area.