Hyundai Sonata Vacuum Leak: Causes and Fixes

Potential Issue Description & Suggested Action Related Codes (If Applicable) Loose or Damaged Vacuum Hoses Vacuum hoses can become loose or damaged, causing leaks. Action: Inspect all vacuum hoses for damage or loose connections; replace or reattach as needed. P0171, P0174 (system too lean) Faulty Intake Manifold Gasket A worn or damaged intake manifold gasket … Read more