OBD Codes

P0075

Intake Valve Control Solenoid Circuit (Bank 1)

Moderatevariable valve

Overview

The P0075 diagnostic trouble code indicates a intake valve control solenoid circuit (bank 1) condition. This code relates to the variable valve timing (VVT) system, which adjusts camshaft timing for optimal performance across the engine's RPM range. VVT issues often stem from oil quality or flow problems and can cause rough idle, poor performance, and decreased fuel economy.

Symptoms

  • Lack of power at certain RPM ranges
  • Ticking or clicking noise from engine
  • Engine rattling noise on startup
  • Check Engine Light (MIL) illuminated

Common Causes

  • Faulty camshaft position sensor
  • Worn timing chain or stretched chain
  • Dirty or low engine oil
  • Faulty VVT solenoid/actuator (oil control valve)

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
  2. 2Check engine oil level and condition; change oil if dirty or incorrect viscosity
  3. 3Test the VVT solenoid (oil control valve) with a multimeter
  4. 4Inspect the VVT solenoid screen/filter for debris or sludge
  5. 5Monitor camshaft position sensor data using scan tool live data

Estimated Repair Cost

$150$1,000

Cost varies by vehicle, location, and repair shop. Includes parts and labor.

Commonly Affected Vehicles

Nissan Altima (VVT)Ford Escape (EcoBoost)BMW 3 Series (VANOS)Subaru Outback

Related Codes

More Variable Valve Codes

Frequently Asked Questions

Yes, dirty or low-quality engine oil is one of the leading causes of VVT system problems. Oil sludge can clog the VVT solenoid screen and oil passages, preventing proper cam timing adjustment.